685840630 has 16 divisors (see below), whose sum is σ = 1235488320. Its totient is φ = 274119552.

The previous prime is 685840627. The next prime is 685840651. The reversal of 685840630 is 36048586.

It is a congruent 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, 13470 + ... + 39409.

It is an arithmetic number, because the mean of its divisors is an integer number (77218020).

Almost surely, 2^685840630 is an apocalyptic number.

685840630 is a deficient number, since it is larger than the sum of its proper divisors (549647690).

685840630 is a wasteful number, since it uses less digits than its factorization.

685840630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54183.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 685840630 is about 26188.5591432595. The cubic root of 685840630 is about 881.8764324880.

The spelling of 685840630 in words is "six hundred eighty-five million, eight hundred forty thousand, six hundred thirty".