400712856 has 16 divisors (see below), whose sum is σ = 1001782200. Its totient is φ = 133570944.

The previous prime is 400712791. The next prime is 400712857. The reversal of 400712856 is 658217004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400712857) 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, 8348161 + ... + 8348208.

Almost surely, 2^400712856 is an apocalyptic number.

It is an amenable number.

400712856 is an abundant number, since it is smaller than the sum of its proper divisors (601069344).

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

400712856 is a wasteful number, since it uses less digits than its factorization.

400712856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16696378 (or 16696374 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 400712856 is about 20017.8134670098. The cubic root of 400712856 is about 737.2437372989.

The spelling of 400712856 in words is "four hundred million, seven hundred twelve thousand, eight hundred fifty-six".