400747536 has 60 divisors (see below), whose sum is σ = 1281759232. Its totient is φ = 114499008.

The previous prime is 400747513. The next prime is 400747541. The reversal of 400747536 is 635747004.

It is a super-2 number, since 2×400747536² = 321197175220142592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 400747536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197776 + ... + 199791.

Almost surely, 2^400747536 is an apocalyptic number.

It is an amenable number.

400747536 is an abundant number, since it is smaller than the sum of its proper divisors (881011696).

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

400747536 is a wasteful number, since it uses less digits than its factorization.

400747536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397588 (or 397579 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The square root of 400747536 is about 20018.6796767419. The cubic root of 400747536 is about 737.2650051260.

The spelling of 400747536 in words is "four hundred million, seven hundred forty-seven thousand, five hundred thirty-six".