401692816 has 20 divisors (see below), whose sum is σ = 889462912. Its totient is φ = 172154016.

The previous prime is 401692807. The next prime is 401692829. The reversal of 401692816 is 618296104.

It is a happy number.

It is a super-2 number, since 2×401692816² = 322714236852019712, which contains 22 as substring.

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, 1793160 + ... + 1793383.

Almost surely, 2^401692816 is an apocalyptic number.

It is an amenable number.

401692816 is an abundant number, since it is smaller than the sum of its proper divisors (487770096).

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

401692816 is a wasteful number, since it uses less digits than its factorization.

401692816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3586558 (or 3586552 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 401692816 is about 20042.2757190894. The cubic root of 401692816 is about 737.8442348188.

The spelling of 401692816 in words is "four hundred one million, six hundred ninety-two thousand, eight hundred sixteen".