400520056 has 8 divisors (see below), whose sum is σ = 750975120. Its totient is φ = 200260024.

The previous prime is 400520011. The next prime is 400520059. The reversal of 400520056 is 650025004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400520059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25032496 + ... + 25032511.

It is an arithmetic number, because the mean of its divisors is an integer number (93871890).

Almost surely, 2^400520056 is an apocalyptic number.

It is an amenable number.

400520056 is a deficient number, since it is larger than the sum of its proper divisors (350455064).

400520056 is a wasteful number, since it uses less digits than its factorization.

400520056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50065013 (or 50065009 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 400520056 is about 20012.9971768349. The cubic root of 400520056 is about 737.1254785565.

The spelling of 400520056 in words is "four hundred million, five hundred twenty thousand, fifty-six".