64247172 has 24 divisors (see below), whose sum is σ = 163538592. Its totient is φ = 19468800.

The previous prime is 64247143. The next prime is 64247201. The reversal of 64247172 is 27174246.

It is an interprime number because it is at equal distance from previous prime (64247143) and next prime (64247201).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243229 + ... + 243492.

It is an arithmetic number, because the mean of its divisors is an integer number (6814108).

Almost surely, 2^64247172 is an apocalyptic number.

It is an amenable number.

64247172 is an abundant number, since it is smaller than the sum of its proper divisors (99291420).

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

64247172 is a wasteful number, since it uses less digits than its factorization.

64247172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486739 (or 486737 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 64247172 is about 8015.4333632063. The cubic root of 64247172 is about 400.5142801731.

The spelling of 64247172 in words is "sixty-four million, two hundred forty-seven thousand, one hundred seventy-two".