400287172 has 12 divisors (see below), whose sum is σ = 716793616. Its totient is φ = 195489000.

The previous prime is 400287163. The next prime is 400287179. The reversal of 400287172 is 271782004.

It is a hoax number, since the sum of its digits (31) 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 (400287179) 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, 1163454 + ... + 1163797.

Almost surely, 2^400287172 is an apocalyptic number.

It is an amenable number.

400287172 is a deficient number, since it is larger than the sum of its proper divisors (316506444).

400287172 is a wasteful number, since it uses less digits than its factorization.

400287172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327298 (or 2327296 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 400287172 is about 20007.1780119036. The cubic root of 400287172 is about 736.9825826641.

The spelling of 400287172 in words is "four hundred million, two hundred eighty-seven thousand, one hundred seventy-two".