402921956 has 12 divisors (see below), whose sum is σ = 706256880. Its totient is φ = 201134280.

The previous prime is 402921943. The next prime is 402921977. The reversal of 402921956 is 659129204.

It is a super-2 number, since 2×402921956² = 324692205253731872, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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, 78890 + ... + 83841.

It is an arithmetic number, because the mean of its divisors is an integer number (58854740).

Almost surely, 2^402921956 is an apocalyptic number.

It is an amenable number.

402921956 is a deficient number, since it is larger than the sum of its proper divisors (303334924).

402921956 is a wasteful number, since it uses less digits than its factorization.

402921956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163354 (or 163352 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 402921956 is about 20072.9159814911. The cubic root of 402921956 is about 738.5960451358.

The spelling of 402921956 in words is "four hundred two million, nine hundred twenty-one thousand, nine hundred fifty-six".