64722924 has 54 divisors (see below), whose sum is σ = 190321404. Its totient is φ = 18491760.

The previous prime is 64722923. The next prime is 64722929. The reversal of 64722924 is 42922746.

64722924 is a `hidden beast` number, since 647 + 2 + 2 + 9 + 2 + 4 = 666.

It is a super-2 number, since 2×64722924² = 8378113782219552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (64722923) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16582 + ... + 20109.

Almost surely, 2^64722924 is an apocalyptic number.

It is an amenable number.

64722924 is an abundant number, since it is smaller than the sum of its proper divisors (125598480).

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

64722924 is a wasteful number, since it uses less digits than its factorization.

64722924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36715 (or 36703 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 64722924 is about 8045.0558730192. The cubic root of 64722924 is about 401.5004562069.

The spelling of 64722924 in words is "sixty-four million, seven hundred twenty-two thousand, nine hundred twenty-four".