402790788 has 18 divisors (see below), whose sum is σ = 1018165694. Its totient is φ = 134263584.

The previous prime is 402790777. The next prime is 402790793. The reversal of 402790788 is 887097204.

It can be written as a sum of positive squares in only one way, i.e., 313714944 + 89075844 = 17712^2 + 9438^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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, 5594281 + ... + 5594352.

Almost surely, 2^402790788 is an apocalyptic number.

It is an amenable number.

402790788 is an abundant number, since it is smaller than the sum of its proper divisors (615374906).

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

402790788 is a wasteful number, since it uses less digits than its factorization.

402790788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11188643 (or 11188638 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 402790788 is about 20069.6484274140. The cubic root of 402790788 is about 738.5158884377.

The spelling of 402790788 in words is "four hundred two million, seven hundred ninety thousand, seven hundred eighty-eight".