64170172 has 48 divisors (see below), whose sum is σ = 130969440. Its totient is φ = 27413760.

The previous prime is 64170143. The next prime is 64170187. The reversal of 64170172 is 27107146.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64170172.

It is a congruent number.

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, 90154 + ... + 90862.

It is an arithmetic number, because the mean of its divisors is an integer number (2728530).

Almost surely, 2^64170172 is an apocalyptic number.

It is an amenable number.

64170172 is an abundant number, since it is smaller than the sum of its proper divisors (66799268).

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

64170172 is a wasteful number, since it uses less digits than its factorization.

64170172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 64170172 is about 8010.6286894351. The cubic root of 64170172 is about 400.3542112434.

It can be divided in two parts, 64 and 170172, that added together give a triangular number (170236 = T₅₈₃).

The spelling of 64170172 in words is "sixty-four million, one hundred seventy thousand, one hundred seventy-two".