64642224 has 40 divisors (see below), whose sum is σ = 169116160. Its totient is φ = 21273408.

The previous prime is 64642181. The next prime is 64642241. The reversal of 64642224 is 42224646.

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

It is a junction number, because it is equal to n+sod(n) for n = 64642191 and 64642200.

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, 4732 + ... + 12315.

It is an arithmetic number, because the mean of its divisors is an integer number (4227904).

Almost surely, 2^64642224 is an apocalyptic number.

It is an amenable number.

64642224 is an abundant number, since it is smaller than the sum of its proper divisors (104473936).

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

64642224 is a wasteful number, since it uses less digits than its factorization.

64642224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17137 (or 17131 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

The square root of 64642224 is about 8040.0388058765. The cubic root of 64642224 is about 401.3335160636. Note that the first 3 decimals are identical.

The spelling of 64642224 in words is "sixty-four million, six hundred forty-two thousand, two hundred twenty-four".