64638212 has 12 divisors (see below), whose sum is σ = 113192016. Its totient is φ = 32297640.

The previous prime is 64638191. The next prime is 64638229. The reversal of 64638212 is 21283646.

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, 2783 + ... + 11705.

It is an arithmetic number, because the mean of its divisors is an integer number (9432668).

Almost surely, 2^64638212 is an apocalyptic number.

It is an amenable number.

64638212 is a deficient number, since it is larger than the sum of its proper divisors (48553804).

64638212 is a wasteful number, since it uses less digits than its factorization.

64638212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10738 (or 10736 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 64638212 is about 8039.7893007218. The cubic root of 64638212 is about 401.3252130109.

The spelling of 64638212 in words is "sixty-four million, six hundred thirty-eight thousand, two hundred twelve".