400556056 has 8 divisors (see below), whose sum is σ = 751042620. Its totient is φ = 200278024.

The previous prime is 400556047. The next prime is 400556071. The reversal of 400556056 is 650655004.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25034746 + ... + 25034761.

Almost surely, 2^400556056 is an apocalyptic number.

It is an amenable number.

400556056 is a deficient number, since it is larger than the sum of its proper divisors (350486564).

400556056 is a wasteful number, since it uses less digits than its factorization.

400556056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50069513 (or 50069509 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 400556056 is about 20013.8965721321. The cubic root of 400556056 is about 737.1475629455.

The spelling of 400556056 in words is "four hundred million, five hundred fifty-six thousand, fifty-six".