685173432 has 16 divisors (see below), whose sum is σ = 1712933640. Its totient is φ = 228391136.

The previous prime is 685173403. The next prime is 685173443. The reversal of 685173432 is 234371586.

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, 14274423 + ... + 14274470.

Almost surely, 2^685173432 is an apocalyptic number.

It is an amenable number.

685173432 is an abundant number, since it is smaller than the sum of its proper divisors (1027760208).

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

685173432 is a wasteful number, since it uses less digits than its factorization.

685173432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28548902 (or 28548898 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 685173432 is about 26175.8176949642. The cubic root of 685173432 is about 881.5903713308.

The spelling of 685173432 in words is "six hundred eighty-five million, one hundred seventy-three thousand, four hundred thirty-two".