87704172 has 36 divisors (see below), whose sum is σ = 221981760. Its totient is φ = 29197152.

The previous prime is 87704161. The next prime is 87704189. The reversal of 87704172 is 27140778.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 50958 + ... + 52650.

It is an arithmetic number, because the mean of its divisors is an integer number (6166160).

Almost surely, 2^87704172 is an apocalyptic number.

It is an amenable number.

87704172 is an abundant number, since it is smaller than the sum of its proper divisors (134277588).

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

87704172 is a wasteful number, since it uses less digits than its factorization.

87704172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 87704172 is about 9365.0505604615. The cubic root of 87704172 is about 444.2970376620.

The spelling of 87704172 in words is "eighty-seven million, seven hundred four thousand, one hundred seventy-two".