685328970 has 32 divisors (see below), whose sum is σ = 1648745280. Its totient is φ = 182314880.

The previous prime is 685328951. The next prime is 685328977. The reversal of 685328970 is 79823586.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (685328977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14691 + ... + 39830.

It is an arithmetic number, because the mean of its divisors is an integer number (51523290).

Almost surely, 2^685328970 is an apocalyptic number.

685328970 is an abundant number, since it is smaller than the sum of its proper divisors (963416310).

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

685328970 is a wasteful number, since it uses less digits than its factorization.

685328970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54950.

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

The square root of 685328970 is about 26178.7885510388. The cubic root of 685328970 is about 881.6570748457.

The spelling of 685328970 in words is "six hundred eighty-five million, three hundred twenty-eight thousand, nine hundred seventy".