685624970 has 16 divisors (see below), whose sum is σ = 1245660768. Its totient is φ = 271686480.

The previous prime is 685624913. The next prime is 685624987. The reversal of 685624970 is 79426586.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319316 + ... + 321455.

It is an arithmetic number, because the mean of its divisors is an integer number (77853798).

Almost surely, 2^685624970 is an apocalyptic number.

685624970 is a deficient number, since it is larger than the sum of its proper divisors (560035798).

685624970 is a wasteful number, since it uses less digits than its factorization.

685624970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640885.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 685624970 is about 26184.4413726931. The cubic root of 685624970 is about 881.7839885581.

The spelling of 685624970 in words is "six hundred eighty-five million, six hundred twenty-four thousand, nine hundred seventy".