685969072 has 10 divisors (see below), whose sum is σ = 1329065108. Its totient is φ = 342984528.

The previous prime is 685969069. The next prime is 685969093. The reversal of 685969072 is 270969586.

It is a happy number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 21436518 + ... + 21436549.

Almost surely, 2^685969072 is an apocalyptic number.

It is an amenable number.

685969072 is a deficient number, since it is larger than the sum of its proper divisors (643096036).

685969072 is a wasteful number, since it uses less digits than its factorization.

685969072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42873075 (or 42873069 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 685969072 is about 26191.0112824992. The cubic root of 685969072 is about 881.9314807006.

The spelling of 685969072 in words is "six hundred eighty-five million, nine hundred sixty-nine thousand, seventy-two".