402620556 has 24 divisors (see below), whose sum is σ = 1011713584. Its totient is φ = 123883200.

The previous prime is 402620549. The next prime is 402620573. The reversal of 402620556 is 655026204.

It is a super-2 number, since 2×402620556² = 324206624227498272, which contains 22 as substring.

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, 1290295 + ... + 1290606.

Almost surely, 2^402620556 is an apocalyptic number.

It is an amenable number.

402620556 is an abundant number, since it is smaller than the sum of its proper divisors (609093028).

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

402620556 is a wasteful number, since it uses less digits than its factorization.

402620556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580921 (or 2580919 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 402620556 is about 20065.4069482779. The cubic root of 402620556 is about 738.4118337973.

The spelling of 402620556 in words is "four hundred two million, six hundred twenty thousand, five hundred fifty-six".