685824988 has 12 divisors (see below), whose sum is σ = 1263361960. Its totient is φ = 324864432.

The previous prime is 685824977. The next prime is 685825003. The reversal of 685824988 is 889428586.

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, 4511931 + ... + 4512082.

Almost surely, 2^685824988 is an apocalyptic number.

It is an amenable number.

685824988 is a deficient number, since it is larger than the sum of its proper divisors (577536972).

685824988 is a wasteful number, since it uses less digits than its factorization.

685824988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9024036 (or 9024034 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 58.

The square root of 685824988 is about 26188.2604996972. The cubic root of 685824988 is about 881.8697281044.

The spelling of 685824988 in words is "six hundred eighty-five million, eight hundred twenty-four thousand, nine hundred eighty-eight".