Clever

"Russ thought he was being clever when he suggested I take command of the Twenty-Eighth Expedition. Twenty-eight being a positive integer that is equal to the sum of its proper divisors. Mathematically perfect.’ He laughed softly. ‘I would have expected that suggestion from Ferrus, or maybe even Horus, but never Russ. He has hidden depths, that one."

Fulgrim: The Palatine Phoenix