405279216 has 30 divisors (see below), whose sum is σ = 1134219320. Its totient is φ = 135093024.

The previous prime is 405279197. The next prime is 405279227. The reversal of 405279216 is 612972504.

405279216 is a `hidden beast` number, since 40 + 527 + 92 + 1 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1407076 + ... + 1407363.

Almost surely, 2^405279216 is an apocalyptic number.

It is an amenable number.

405279216 is an abundant number, since it is smaller than the sum of its proper divisors (728940104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405279216 is a wasteful number, since it uses less digits than its factorization.

405279216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814453 (or 2814444 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 405279216 is about 20131.5477795424. The cubic root of 405279216 is about 740.0336093817.

The spelling of 405279216 in words is "four hundred five million, two hundred seventy-nine thousand, two hundred sixteen".