687244328 has 16 divisors (see below), whose sum is σ = 1288872000. Its totient is φ = 343545136.

The previous prime is 687244309. The next prime is 687244391. The reversal of 687244328 is 823442786.

It is a happy number.

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, 50033 + ... + 62271.

It is an arithmetic number, because the mean of its divisors is an integer number (80554500).

Almost surely, 2^687244328 is an apocalyptic number.

It is an amenable number.

687244328 is a deficient number, since it is larger than the sum of its proper divisors (601627672).

687244328 is a wasteful number, since it uses less digits than its factorization.

687244328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19264 (or 19260 counting only the distinct ones).

The product of its digits is 516096, while the sum is 44.

The square root of 687244328 is about 26215.3452771464. The cubic root of 687244328 is about 882.4776628458.

The spelling of 687244328 in words is "six hundred eighty-seven million, two hundred forty-four thousand, three hundred twenty-eight".