686064 has 20 divisors (see below), whose sum is σ = 1772456. Its totient is φ = 228672.

The previous prime is 686057. The next prime is 686087. The reversal of 686064 is 460686.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent 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, 7099 + ... + 7194.

2⁶⁸⁶⁰⁶⁴ is an apocalyptic number.

It is an amenable number.

686064 is an abundant number, since it is smaller than the sum of its proper divisors (1086392).

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

686064 is a wasteful number, since it uses less digits than its factorization.

686064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14304 (or 14298 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 686064 is about 828.2898043559. The cubic root of 686064 is about 88.1972160926.

The spelling of 686064 in words is "six hundred eighty-six thousand, sixty-four".