685390532 has 24 divisors (see below), whose sum is σ = 1240200192. Its totient is φ = 331084800.

The previous prime is 685390529. The next prime is 685390543. The reversal of 685390532 is 235093586.

It is a self number, because there is not a number n which added to its sum of digits gives 685390532.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75173 + ... + 83795.

It is an arithmetic number, because the mean of its divisors is an integer number (51675008).

Almost surely, 2^685390532 is an apocalyptic number.

685390532 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

685390532 is a deficient number, since it is larger than the sum of its proper divisors (554809660).

685390532 is a wasteful number, since it uses less digits than its factorization.

685390532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9299 (or 9297 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 685390532 is about 26179.9643238871. The cubic root of 685390532 is about 881.6834733347.

The spelling of 685390532 in words is "six hundred eighty-five million, three hundred ninety thousand, five hundred thirty-two".