168404904 has 96 divisors (see below), whose sum is σ = 482976000. Its totient is φ = 52862976.

The previous prime is 168404879. The next prime is 168404911. The reversal of 168404904 is 409404861.

It is a happy number.

168404904 is a `hidden beast` number, since 168 + 4 + 0 + 490 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351337 + ... + 351815.

It is an arithmetic number, because the mean of its divisors is an integer number (5031000).

Almost surely, 2^168404904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168404904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241488000).

168404904 is an abundant number, since it is smaller than the sum of its proper divisors (314571096).

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

168404904 is a wasteful number, since it uses less digits than its factorization.

168404904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 168404904 is about 12977.0915077301. The cubic root of 168404904 is about 552.2277730453.

The spelling of 168404904 in words is "one hundred sixty-eight million, four hundred four thousand, nine hundred four".