689705264 has 20 divisors (see below), whose sum is σ = 1336912200. Its totient is φ = 344695680.

The previous prime is 689705257. The next prime is 689705287. The reversal of 689705264 is 462507986.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31787 + ... + 48885.

It is an arithmetic number, because the mean of its divisors is an integer number (66845610).

Almost surely, 2^689705264 is an apocalyptic number.

It is an amenable number.

689705264 is a deficient number, since it is larger than the sum of its proper divisors (647206936).

689705264 is a wasteful number, since it uses less digits than its factorization.

689705264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19628 (or 19622 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 689705264 is about 26262.2402700150. The cubic root of 689705264 is about 883.5297554255.

The spelling of 689705264 in words is "six hundred eighty-nine million, seven hundred five thousand, two hundred sixty-four".