685911042 has 24 divisors (see below), whose sum is σ = 1487026944. Its totient is φ = 228500664.

The previous prime is 685911041. The next prime is 685911047. The reversal of 685911042 is 240119586.

685911042 is a `hidden beast` number, since 68 + 591 + 1 + 0 + 4 + 2 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 685910988 and 685911006.

It is not an unprimeable number, because it can be changed into a prime (685911041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22363 + ... + 43265.

It is an arithmetic number, because the mean of its divisors is an integer number (61959456).

Almost surely, 2^685911042 is an apocalyptic number.

685911042 is an abundant number, since it is smaller than the sum of its proper divisors (801115902).

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

685911042 is a wasteful number, since it uses less digits than its factorization.

685911042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22734 (or 22731 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 685911042 is about 26189.9034362481. The cubic root of 685911042 is about 881.9066108101.

The spelling of 685911042 in words is "six hundred eighty-five million, nine hundred eleven thousand, forty-two".