405161632 has 12 divisors (see below), whose sum is σ = 797662026. Its totient is φ = 202580800.

The previous prime is 405161621. The next prime is 405161633. The reversal of 405161632 is 236161504.

It can be written as a sum of positive squares in only one way, i.e., 379314576 + 25847056 = 19476^2 + 5084^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 405161632.

It is not an unprimeable number, because it can be changed into a prime (405161633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330619 + ... + 6330682.

Almost surely, 2^405161632 is an apocalyptic number.

It is an amenable number.

405161632 is a deficient number, since it is larger than the sum of its proper divisors (392500394).

405161632 is a wasteful number, since it uses less digits than its factorization.

405161632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12661311 (or 12661303 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 405161632 is about 20128.6271762383. The cubic root of 405161632 is about 739.9620336012.

The spelling of 405161632 in words is "four hundred five million, one hundred sixty-one thousand, six hundred thirty-two".