685356402 has 32 divisors (see below), whose sum is σ = 1409838912. Its totient is φ = 221949504.

The previous prime is 685356383. The next prime is 685356431. The reversal of 685356402 is 204653586.

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, 181728 + ... + 185460.

It is an arithmetic number, because the mean of its divisors is an integer number (44057466).

Almost surely, 2^685356402 is an apocalyptic number.

685356402 is an abundant number, since it is smaller than the sum of its proper divisors (724482510).

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

685356402 is a wasteful number, since it uses less digits than its factorization.

685356402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602.

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 685356402 is about 26179.3124814232. The cubic root of 685356402 is about 881.6688381960.

The spelling of 685356402 in words is "six hundred eighty-five million, three hundred fifty-six thousand, four hundred two".