684935052 has 12 divisors (see below), whose sum is σ = 1598181816. Its totient is φ = 228311680.

The previous prime is 684935039. The next prime is 684935057. The reversal of 684935052 is 250539486.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 684934995 and 684935013.

It is not an unprimeable number, because it can be changed into a prime (684935057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28538949 + ... + 28538972.

It is an arithmetic number, because the mean of its divisors is an integer number (133181818).

Almost surely, 2^684935052 is an apocalyptic number.

It is an amenable number.

684935052 is an abundant number, since it is smaller than the sum of its proper divisors (913246764).

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

684935052 is a wasteful number, since it uses less digits than its factorization.

684935052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57077928 (or 57077926 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 684935052 is about 26171.2638594318. The cubic root of 684935052 is about 881.4881208741.

The spelling of 684935052 in words is "six hundred eighty-four million, nine hundred thirty-five thousand, fifty-two".