686676484 has 24 divisors (see below), whose sum is σ = 1295322840. Its totient is φ = 316633344.

The previous prime is 686676481. The next prime is 686676509. The reversal of 686676484 is 484676686.

It can be written as a sum of positive squares in 4 ways, for example, as 760384 + 685916100 = 872^2 + 26190^2 .

It is not an unprimeable number, because it can be changed into a prime (686676481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56502 + ... + 67570.

It is an arithmetic number, because the mean of its divisors is an integer number (53971785).

Almost surely, 2^686676484 is an apocalyptic number.

It is an amenable number.

686676484 is a deficient number, since it is larger than the sum of its proper divisors (608646356).

686676484 is a wasteful number, since it uses less digits than its factorization.

686676484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12279 (or 12277 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 55.

The square root of 686676484 is about 26204.5126648064. The cubic root of 686676484 is about 882.2345432327.

The spelling of 686676484 in words is "six hundred eighty-six million, six hundred seventy-six thousand, four hundred eighty-four".