685397082 has 32 divisors (see below), whose sum is σ = 1405978560. Its totient is φ = 222615680.

The previous prime is 685397059. The next prime is 685397117. The reversal of 685397082 is 280793586.

It is a super-2 number, since 2×685397082² = 939538320028229448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308608 + ... + 310820.

It is an arithmetic number, because the mean of its divisors is an integer number (43936830).

Almost surely, 2^685397082 is an apocalyptic number.

685397082 is an abundant number, since it is smaller than the sum of its proper divisors (720581478).

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

685397082 is a wasteful number, since it uses less digits than its factorization.

685397082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518.

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 685397082 is about 26180.0894192514. The cubic root of 685397082 is about 881.6862819565.

The spelling of 685397082 in words is "six hundred eighty-five million, three hundred ninety-seven thousand, eighty-two".