72170880 has 64 divisors (see below), whose sum is σ = 230050800. Its totient is φ = 19245056.

The previous prime is 72170851. The next prime is 72170893. The reversal of 72170880 is 8807127.

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

It is a congruent number.

It is an unprimeable number.

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, 16875 + ... + 20714.

Almost surely, 2^72170880 is an apocalyptic number.

It is an amenable number.

72170880 is an abundant number, since it is smaller than the sum of its proper divisors (157879920).

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

72170880 is a wasteful number, since it uses less digits than its factorization.

72170880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37611 (or 37599 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 72170880 is about 8495.3446074894. The cubic root of 72170880 is about 416.3456200711.

The spelling of 72170880 in words is "seventy-two million, one hundred seventy thousand, eight hundred eighty".