685692672 has 288 divisors, whose sum is σ = 2256576000. Its totient is φ = 184246272.

The previous prime is 685692647. The next prime is 685692713. The reversal of 685692672 is 276296586.

Its product of digits (2177280) is a multiple of the sum of its prime divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5004988 + ... + 5005124.

Almost surely, 2^685692672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685692672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1128288000).

685692672 is an abundant number, since it is smaller than the sum of its proper divisors (1570883328).

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

685692672 is a wasteful number, since it uses less digits than its factorization.

685692672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 168 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The square root of 685692672 is about 26185.7341313930. The cubic root of 685692672 is about 881.8130115067.

The spelling of 685692672 in words is "six hundred eighty-five million, six hundred ninety-two thousand, six hundred seventy-two".