400252764 has 12 divisors (see below), whose sum is σ = 933923144. Its totient is φ = 133417584.

The previous prime is 400252763. The next prime is 400252793. The reversal of 400252764 is 467252004.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400252763) 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, 16677187 + ... + 16677210.

Almost surely, 2^400252764 is an apocalyptic number.

It is an amenable number.

400252764 is an abundant number, since it is smaller than the sum of its proper divisors (533670380).

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

400252764 is a wasteful number, since it uses less digits than its factorization.

400252764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33354404 (or 33354402 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 400252764 is about 20006.3181020397. The cubic root of 400252764 is about 736.9614654720.

The spelling of 400252764 in words is "four hundred million, two hundred fifty-two thousand, seven hundred sixty-four".