685123960 has 16 divisors (see below), whose sum is σ = 1541529000. Its totient is φ = 274049568.

The previous prime is 685123939. The next prime is 685123961. The reversal of 685123960 is 69321586.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 17128099 = 685123960 / (6 + 8 + 5 + 1 + 2 + 3 + 9 + 6 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685123961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8564010 + ... + 8564089.

Almost surely, 2^685123960 is an apocalyptic number.

It is an amenable number.

685123960 is an abundant number, since it is smaller than the sum of its proper divisors (856405040).

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

685123960 is a wasteful number, since it uses less digits than its factorization.

685123960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17128110 (or 17128106 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 685123960 is about 26174.8726835490. The cubic root of 685123960 is about 881.5691528156.

The spelling of 685123960 in words is "six hundred eighty-five million, one hundred twenty-three thousand, nine hundred sixty".