402990812 has 24 divisors (see below), whose sum is σ = 812335104. Its totient is φ = 171348912.

The previous prime is 402990803. The next prime is 402990857. The reversal of 402990812 is 218099204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53108 + ... + 60219.

It is an arithmetic number, because the mean of its divisors is an integer number (33847296).

Almost surely, 2^402990812 is an apocalyptic number.

It is an amenable number.

402990812 is an abundant number, since it is smaller than the sum of its proper divisors (409344292).

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

402990812 is a wasteful number, since it uses less digits than its factorization.

402990812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113465 (or 113463 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 402990812 is about 20074.6310551402. The cubic root of 402990812 is about 738.6381160397.

The spelling of 402990812 in words is "four hundred two million, nine hundred ninety thousand, eight hundred twelve".