64622972 has 12 divisors (see below), whose sum is σ = 116738496. Its totient is φ = 31269120.

The previous prime is 64622969. The next prime is 64622977. The reversal of 64622972 is 27922646.

It is a happy number.

It is a super-2 number, since 2×64622972² = 8352257020225568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64622977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260453 + ... + 260700.

It is an arithmetic number, because the mean of its divisors is an integer number (9728208).

Almost surely, 2^64622972 is an apocalyptic number.

64622972 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

64622972 is a deficient number, since it is larger than the sum of its proper divisors (52115524).

64622972 is a wasteful number, since it uses less digits than its factorization.

64622972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521188 (or 521186 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 64622972 is about 8038.8414588173. The cubic root of 64622972 is about 401.2936698685.

The spelling of 64622972 in words is "sixty-four million, six hundred twenty-two thousand, nine hundred seventy-two".