685889136 has 60 divisors (see below), whose sum is σ = 1981470400. Its totient is φ = 221253120.

The previous prime is 685889119. The next prime is 685889147. The reversal of 685889136 is 631988586.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72361 + ... + 81288.

Almost surely, 2^685889136 is an apocalyptic number.

It is an amenable number.

685889136 is an abundant number, since it is smaller than the sum of its proper divisors (1295581264).

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

685889136 is a wasteful number, since it uses less digits than its factorization.

685889136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153694 (or 153685 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 685889136 is about 26189.4852183085. The cubic root of 685889136 is about 881.8972222011.

The spelling of 685889136 in words is "six hundred eighty-five million, eight hundred eighty-nine thousand, one hundred thirty-six".