170981604 has 72 divisors (see below), whose sum is σ = 456805440. Its totient is φ = 55901664.

The previous prime is 170981599. The next prime is 170981623. The reversal of 170981604 is 406189071.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49857 + ... + 53175.

It is an arithmetic number, because the mean of its divisors is an integer number (6344520).

Almost surely, 2^170981604 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 170981604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228402720).

170981604 is an abundant number, since it is smaller than the sum of its proper divisors (285823836).

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

170981604 is a wasteful number, since it uses less digits than its factorization.

170981604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391 (or 3377 counting only the distinct ones).

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

The square root of 170981604 is about 13075.9934230635. The cubic root of 170981604 is about 555.0300056823.

The spelling of 170981604 in words is "one hundred seventy million, nine hundred eighty-one thousand, six hundred four".