402638652628 has 12 divisors (see below), whose sum is σ = 721004099200. Its totient is φ = 196637481432.

The previous prime is 402638652587. The next prime is 402638652667. The reversal of 402638652628 is 826256836204.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 1170461028 + ... + 1170461371.

Almost surely, 2^402638652628 is an apocalyptic number.

It is an amenable number.

402638652628 is a deficient number, since it is larger than the sum of its proper divisors (318365446572).

402638652628 is a wasteful number, since it uses less digits than its factorization.

402638652628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340922446 (or 2340922444 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 52.

The spelling of 402638652628 in words is "four hundred two billion, six hundred thirty-eight million, six hundred fifty-two thousand, six hundred twenty-eight".