400615972 has 12 divisors (see below), whose sum is σ = 701347696. Its totient is φ = 200230920.

The previous prime is 400615951. The next prime is 400615973. The reversal of 400615972 is 279516004.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (400615973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6654 + ... + 29077.

Almost surely, 2^400615972 is an apocalyptic number.

It is an amenable number.

400615972 is a deficient number, since it is larger than the sum of its proper divisors (300731724).

400615972 is a wasteful number, since it uses less digits than its factorization.

400615972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38538 (or 38536 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 400615972 is about 20015.3933760993. The cubic root of 400615972 is about 737.1843157967.

The spelling of 400615972 in words is "four hundred million, six hundred fifteen thousand, nine hundred seventy-two".