400561936 has 10 divisors (see below), whose sum is σ = 776088782. Its totient is φ = 200280960.

The previous prime is 400561927. The next prime is 400561957. The reversal of 400561936 is 639165004.

It can be written as a sum of positive squares in only one way, i.e., 226321936 + 174240000 = 15044^2 + 13200^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12517545 + ... + 12517576.

Almost surely, 2^400561936 is an apocalyptic number.

It is an amenable number.

400561936 is a deficient number, since it is larger than the sum of its proper divisors (375526846).

400561936 is a wasteful number, since it uses less digits than its factorization.

400561936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25035129 (or 25035123 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 400561936 is about 20014.0434695241. The cubic root of 400561936 is about 737.1511699367.

The spelling of 400561936 in words is "four hundred million, five hundred sixty-one thousand, nine hundred thirty-six".