171680904 has 64 divisors (see below), whose sum is σ = 482976000. Its totient is φ = 56496960.

The previous prime is 171680893. The next prime is 171680917. The reversal of 171680904 is 409086171.

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 15 ways as a sum of consecutive naturals, for example, 12034 + ... + 22094.

It is an arithmetic number, because the mean of its divisors is an integer number (7546500).

Almost surely, 2^171680904 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 171680904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241488000).

171680904 is an abundant number, since it is smaller than the sum of its proper divisors (311295096).

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

171680904 is a wasteful number, since it uses less digits than its factorization.

171680904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155 (or 10145 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 171680904 is about 13102.7059800638. The cubic root of 171680904 is about 555.7856513779.

The spelling of 171680904 in words is "one hundred seventy-one million, six hundred eighty thousand, nine hundred four".