685960884 has 36 divisors (see below), whose sum is σ = 1981665504. Its totient is φ = 195988752.

The previous prime is 685960883. The next prime is 685960907. The reversal of 685960884 is 488069586.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×685960884² = 941084668756122912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 685960884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685960883) 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, 1360782 + ... + 1361285.

It is an arithmetic number, because the mean of its divisors is an integer number (55046264).

Almost surely, 2^685960884 is an apocalyptic number.

It is an amenable number.

685960884 is an abundant number, since it is smaller than the sum of its proper divisors (1295704620).

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

685960884 is a wasteful number, since it uses less digits than its factorization.

685960884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722084 (or 2722079 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The square root of 685960884 is about 26190.8549688627. The cubic root of 685960884 is about 881.9279716582.

The spelling of 685960884 in words is "six hundred eighty-five million, nine hundred sixty thousand, eight hundred eighty-four".