64320172 has 12 divisors (see below), whose sum is σ = 128640400. Its totient is φ = 27565776.

The previous prime is 64320143. The next prime is 64320181. The reversal of 64320172 is 27102346.

64320172 is an admirable number.

It is a super-2 number, since 2×64320172² = 8274169052219168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148547 + ... + 1148602.

Almost surely, 2^64320172 is an apocalyptic number.

It is an amenable number.

64320172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64320172 is a wasteful number, since it uses less digits than its factorization.

64320172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297160 (or 2297158 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 64320172 is about 8019.9857855236. The cubic root of 64320172 is about 400.6659157753.

The spelling of 64320172 in words is "sixty-four million, three hundred twenty thousand, one hundred seventy-two".