64438648 has 16 divisors (see below), whose sum is σ = 120981960. Its totient is φ = 32176800.

The previous prime is 64438637. The next prime is 64438711. The reversal of 64438648 is 84683446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1663 + ... + 11473.

Almost surely, 2^64438648 is an apocalyptic number.

It is an amenable number.

64438648 is a deficient number, since it is larger than the sum of its proper divisors (56543312).

64438648 is a wasteful number, since it uses less digits than its factorization.

64438648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10638 (or 10634 counting only the distinct ones).

The product of its digits is 442368, while the sum is 43.

The square root of 64438648 is about 8027.3686846936. The cubic root of 64438648 is about 400.9117701091.

The spelling of 64438648 in words is "sixty-four million, four hundred thirty-eight thousand, six hundred forty-eight".