64862172 has 18 divisors (see below), whose sum is σ = 163957248. Its totient is φ = 21620712.

The previous prime is 64862167. The next prime is 64862173. The reversal of 64862172 is 27126846.

64862172 is a `hidden beast` number, since 6 + 486 + 2 + 172 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1801727 = 64862172 / (6 + 4 + 8 + 6 + 2 + 1 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64862173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 900828 + ... + 900899.

It is an arithmetic number, because the mean of its divisors is an integer number (9108736).

Almost surely, 2^64862172 is an apocalyptic number.

It is an amenable number.

64862172 is an abundant number, since it is smaller than the sum of its proper divisors (99095076).

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

64862172 is a wasteful number, since it uses less digits than its factorization.

64862172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801737 (or 1801732 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 64862172 is about 8053.7054825714. The cubic root of 64862172 is about 401.7881857338.

The spelling of 64862172 in words is "sixty-four million, eight hundred sixty-two thousand, one hundred seventy-two".