686964648 has 16 divisors (see below), whose sum is σ = 1717411680. Its totient is φ = 228988208.

The previous prime is 686964613. The next prime is 686964653. The reversal of 686964648 is 846469686.

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, 14311740 + ... + 14311787.

It is an arithmetic number, because the mean of its divisors is an integer number (107338230).

Almost surely, 2^686964648 is an apocalyptic number.

It is an amenable number.

686964648 is an abundant number, since it is smaller than the sum of its proper divisors (1030447032).

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

686964648 is a wasteful number, since it uses less digits than its factorization.

686964648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28623536 (or 28623532 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 57.

The square root of 686964648 is about 26210.0104540231. The cubic root of 686964648 is about 882.3579359738.

It can be divided in two parts, 6869 and 64648, that added together give a palindrome (71517).

The spelling of 686964648 in words is "six hundred eighty-six million, nine hundred sixty-four thousand, six hundred forty-eight".