685329590 has 32 divisors (see below), whose sum is σ = 1353832704. Its totient is φ = 247711840.

The previous prime is 685329569. The next prime is 685329613. The reversal of 685329590 is 95923586.

685329590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 284 + ... + 37023.

It is an arithmetic number, because the mean of its divisors is an integer number (42307272).

Almost surely, 2^685329590 is an apocalyptic number.

685329590 is a deficient number, since it is larger than the sum of its proper divisors (668503114).

685329590 is a wasteful number, since it uses less digits than its factorization.

685329590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37492.

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 685329590 is about 26178.8003926842. The cubic root of 685329590 is about 881.6573407167.

The spelling of 685329590 in words is "six hundred eighty-five million, three hundred twenty-nine thousand, five hundred ninety".