64859172 has 96 divisors (see below), whose sum is σ = 183859200. Its totient is φ = 17394432.

The previous prime is 64859159. The next prime is 64859173. The reversal of 64859172 is 27195846.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (64859173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113704 + ... + 114272.

It is an arithmetic number, because the mean of its divisors is an integer number (1915200).

Almost surely, 2^64859172 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 64859172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91929600).

64859172 is an abundant number, since it is smaller than the sum of its proper divisors (119000028).

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

64859172 is a wasteful number, since it uses less digits than its factorization.

64859172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 663 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 64859172 is about 8053.5192307463. The cubic root of 64859172 is about 401.7819911466.

The spelling of 64859172 in words is "sixty-four million, eight hundred fifty-nine thousand, one hundred seventy-two".