64422644 has 72 divisors (see below), whose sum is σ = 137784864. Its totient is φ = 25977600.

The previous prime is 64422629. The next prime is 64422697. The reversal of 64422644 is 44622446.

It is a self number, because there is not a number n which added to its sum of digits gives 64422644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 961499 + ... + 961565.

Almost surely, 2^64422644 is an apocalyptic number.

It is an amenable number.

64422644 is an abundant number, since it is smaller than the sum of its proper divisors (73362220).

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

64422644 is a wasteful number, since it uses less digits than its factorization.

64422644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 134 counting only the distinct ones).

The product of its digits is 36864, while the sum is 32.

The square root of 64422644 is about 8026.3717830661. The cubic root of 64422644 is about 400.8785771758.

The spelling of 64422644 in words is "sixty-four million, four hundred twenty-two thousand, six hundred forty-four".