400940972 has 24 divisors (see below), whose sum is σ = 717066000. Its totient is φ = 196088256.

The previous prime is 400940963. The next prime is 400940999. The reversal of 400940972 is 279049004.

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, 71279 + ... + 76697.

It is an arithmetic number, because the mean of its divisors is an integer number (29877750).

Almost surely, 2^400940972 is an apocalyptic number.

It is an amenable number.

400940972 is a deficient number, since it is larger than the sum of its proper divisors (316125028).

400940972 is a wasteful number, since it uses less digits than its factorization.

400940972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5825 (or 5823 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 400940972 is about 20023.5104814316. The cubic root of 400940972 is about 737.3836090191.

Adding to 400940972 its reverse (279049004), we get a palindrome (679989976).

The spelling of 400940972 in words is "four hundred million, nine hundred forty thousand, nine hundred seventy-two".