686129696 has 48 divisors (see below), whose sum is σ = 1593607680. Its totient is φ = 284567040.

The previous prime is 686129683. The next prime is 686129737. The reversal of 686129696 is 696921686.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42461 + ... + 56348.

It is an arithmetic number, because the mean of its divisors is an integer number (33200160).

Almost surely, 2^686129696 is an apocalyptic number.

It is an amenable number.

686129696 is an abundant number, since it is smaller than the sum of its proper divisors (907477984).

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

686129696 is a wasteful number, since it uses less digits than its factorization.

686129696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98857 (or 98849 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 53.

The square root of 686129696 is about 26194.0774985492. The cubic root of 686129696 is about 882.0003119412. Note that the first 3 decimals are identical.

The spelling of 686129696 in words is "six hundred eighty-six million, one hundred twenty-nine thousand, six hundred ninety-six".