687344264 has 16 divisors (see below), whose sum is σ = 1323602700. Its totient is φ = 334383552.

The previous prime is 687344257. The next prime is 687344321. The reversal of 687344264 is 462443786.

It can be written as a sum of positive squares in 2 ways, for example, as 486555364 + 200788900 = 22058^2 + 14170^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1160759 + ... + 1161350.

Almost surely, 2^687344264 is an apocalyptic number.

It is an amenable number.

687344264 is a deficient number, since it is larger than the sum of its proper divisors (636258436).

687344264 is a wasteful number, since it uses less digits than its factorization.

687344264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322152 (or 2322148 counting only the distinct ones).

The product of its digits is 774144, while the sum is 44.

The square root of 687344264 is about 26217.2512670570. The cubic root of 687344264 is about 882.5204360923.

The spelling of 687344264 in words is "six hundred eighty-seven million, three hundred forty-four thousand, two hundred sixty-four".