400274664 has 16 divisors (see below), whose sum is σ = 1000686720. Its totient is φ = 133424880.

The previous prime is 400274657. The next prime is 400274669. The reversal of 400274664 is 466472004.

It is not an unprimeable number, because it can be changed into a prime (400274669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8339032 + ... + 8339079.

It is an arithmetic number, because the mean of its divisors is an integer number (62542920).

Almost surely, 2^400274664 is an apocalyptic number.

It is an amenable number.

400274664 is an abundant number, since it is smaller than the sum of its proper divisors (600412056).

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

400274664 is a wasteful number, since it uses less digits than its factorization.

400274664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16678120 (or 16678116 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 400274664 is about 20006.8654216496. The cubic root of 400274664 is about 736.9749062801.

The spelling of 400274664 in words is "four hundred million, two hundred seventy-four thousand, six hundred sixty-four".