64638068 has 12 divisors (see below), whose sum is σ = 123400032. Its totient is φ = 29380920.

The previous prime is 64638061. The next prime is 64638103. The reversal of 64638068 is 86083646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64638061) 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, 734480 + ... + 734567.

It is an arithmetic number, because the mean of its divisors is an integer number (10283336).

Almost surely, 2^64638068 is an apocalyptic number.

It is an amenable number.

64638068 is a deficient number, since it is larger than the sum of its proper divisors (58761964).

64638068 is a wasteful number, since it uses less digits than its factorization.

64638068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469062 (or 1469060 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 64638068 is about 8039.7803452582. The cubic root of 64638068 is about 401.3249149887.

The spelling of 64638068 in words is "sixty-four million, six hundred thirty-eight thousand, sixty-eight".