686977536 has 160 divisors (see below), whose sum is σ = 2109115008. Its totient is φ = 194641920.

The previous prime is 686977397. The next prime is 686977579. The reversal of 686977536 is 635779686.

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 15 ways as a sum of consecutive naturals, for example, 1945936 + ... + 1946288.

Almost surely, 2^686977536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686977536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1054557504).

686977536 is an abundant number, since it is smaller than the sum of its proper divisors (1422137472).

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

686977536 is a wasteful number, since it uses less digits than its factorization.

686977536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 546 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 57.

The square root of 686977536 is about 26210.2563131306. The cubic root of 686977536 is about 882.3634538502.

The spelling of 686977536 in words is "six hundred eighty-six million, nine hundred seventy-seven thousand, five hundred thirty-six".