64622172 has 24 divisors (see below), whose sum is σ = 151975936. Its totient is φ = 21370608.

The previous prime is 64622171. The next prime is 64622177. The reversal of 64622172 is 27122646.

It is a super-2 number, since 2×64622172² = 8352050227995168, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64622171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19678 + ... + 22725.

Almost surely, 2^64622172 is an apocalyptic number.

It is an amenable number.

64622172 is an abundant number, since it is smaller than the sum of its proper divisors (87353764).

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

64622172 is a wasteful number, since it uses less digits than its factorization.

64622172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42537 (or 42535 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 64622172 is about 8038.7917002495. The cubic root of 64622172 is about 401.2920139235.

The spelling of 64622172 in words is "sixty-four million, six hundred twenty-two thousand, one hundred seventy-two".