402405136 has 20 divisors (see below), whose sum is σ = 891040192. Its totient is φ = 172459296.

The previous prime is 402405121. The next prime is 402405169. The reversal of 402405136 is 631504204.

It is a self number, because there is not a number n which added to its sum of digits gives 402405136.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1796340 + ... + 1796563.

Almost surely, 2^402405136 is an apocalyptic number.

It is an amenable number.

402405136 is an abundant number, since it is smaller than the sum of its proper divisors (488635056).

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

402405136 is a wasteful number, since it uses less digits than its factorization.

402405136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3592918 (or 3592912 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 402405136 is about 20060.0382851080. The cubic root of 402405136 is about 738.2801158535.

The spelling of 402405136 in words is "four hundred two million, four hundred five thousand, one hundred thirty-six".