168683904 has 64 divisors (see below), whose sum is σ = 497862000. Its totient is φ = 56226816.

The previous prime is 168683903. The next prime is 168683917. The reversal of 168683904 is 409386861.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 168683904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168683903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20949 + ... + 27860.

Almost surely, 2^168683904 is an apocalyptic number.

It is an amenable number.

168683904 is an abundant number, since it is smaller than the sum of its proper divisors (329178096).

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

168683904 is an equidigital number, since it uses as much as digits as its factorization.

168683904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48832 (or 48814 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 168683904 is about 12987.8367713796. The cubic root of 168683904 is about 552.5325673015.

The spelling of 168683904 in words is "one hundred sixty-eight million, six hundred eighty-three thousand, nine hundred four".