252787664 has 40 divisors (see below), whose sum is σ = 528716160. Its totient is φ = 116724608.

The previous prime is 252787657. The next prime is 252787697. The reversal of 252787664 is 466787252.

252787664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1172 + ... + 22515.

It is an arithmetic number, because the mean of its divisors is an integer number (13217904).

Almost surely, 2^252787664 is an apocalyptic number.

It is an amenable number.

252787664 is an abundant number, since it is smaller than the sum of its proper divisors (275928496).

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

252787664 is a wasteful number, since it uses less digits than its factorization.

252787664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23747 (or 23741 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 47.

The square root of 252787664 is about 15899.2975945480. The cubic root of 252787664 is about 632.2933664457.

The spelling of 252787664 in words is "two hundred fifty-two million, seven hundred eighty-seven thousand, six hundred sixty-four".