400684856 has 32 divisors (see below), whose sum is σ = 882630000. Its totient is φ = 168119040.

The previous prime is 400684829. The next prime is 400684927. The reversal of 400684856 is 658486004.

It is a congruent number.

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, 173981 + ... + 176268.

Almost surely, 2^400684856 is an apocalyptic number.

It is an amenable number.

400684856 is an abundant number, since it is smaller than the sum of its proper divisors (481945144).

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

400684856 is a wasteful number, since it uses less digits than its factorization.

400684856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350279 (or 350275 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 400684856 is about 20017.1140777086. The cubic root of 400684856 is about 737.2265651475.

The spelling of 400684856 in words is "four hundred million, six hundred eighty-four thousand, eight hundred fifty-six".