405316872 has 40 divisors (see below), whose sum is σ = 1135264350. Its totient is φ = 135105408.

The previous prime is 405316859. The next prime is 405316883. The reversal of 405316872 is 278613504.

405316872 is a `hidden beast` number, since 40 + 531 + 6 + 87 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 341732196 + 63584676 = 18486^2 + 7974^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 312097 + ... + 313392.

Almost surely, 2^405316872 is an apocalyptic number.

It is an amenable number.

405316872 is an abundant number, since it is smaller than the sum of its proper divisors (729947478).

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

405316872 is a wasteful number, since it uses less digits than its factorization.

405316872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625507 (or 625494 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 405316872 is about 20132.4830063259. The cubic root of 405316872 is about 740.0565284307.

The spelling of 405316872 in words is "four hundred five million, three hundred sixteen thousand, eight hundred seventy-two".