401023992 has 32 divisors (see below), whose sum is σ = 1005109200. Its totient is φ = 133334784.

The previous prime is 401023991. The next prime is 401024009. The reversal of 401023992 is 299320104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401023991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11517 + ... + 30572.

Almost surely, 2^401023992 is an apocalyptic number.

It is an amenable number.

401023992 is an abundant number, since it is smaller than the sum of its proper divisors (604085208).

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

401023992 is a wasteful number, since it uses less digits than its factorization.

401023992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42495 (or 42491 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 401023992 is about 20025.5834371935. The cubic root of 401023992 is about 737.4345004360.

Subtracting from 401023992 its product of nonzero digits (3888), we obtain a palindrome (401020104).

The spelling of 401023992 in words is "four hundred one million, twenty-three thousand, nine hundred ninety-two".