400557474 has 20 divisors (see below), whose sum is σ = 897545814. Its totient is φ = 133519104.

The previous prime is 400557467. The next prime is 400557491. The reversal of 400557474 is 474755004.

It can be written as a sum of positive squares in only one way, i.e., 226713249 + 173844225 = 15057^2 + 13185^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1236127 + ... + 1236450.

Almost surely, 2^400557474 is an apocalyptic number.

400557474 is an abundant number, since it is smaller than the sum of its proper divisors (496988340).

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

400557474 is a wasteful number, since it uses less digits than its factorization.

400557474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472591 (or 2472582 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 400557474 is about 20013.9319974862. The cubic root of 400557474 is about 737.1484327980.

The spelling of 400557474 in words is "four hundred million, five hundred fifty-seven thousand, four hundred seventy-four".