64638204 has 12 divisors (see below), whose sum is σ = 150822504. Its totient is φ = 21546064.

The previous prime is 64638191. The next prime is 64638229. The reversal of 64638204 is 40283646.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2693247 + ... + 2693270.

It is an arithmetic number, because the mean of its divisors is an integer number (12568542).

Almost surely, 2^64638204 is an apocalyptic number.

It is an amenable number.

64638204 is an abundant number, since it is smaller than the sum of its proper divisors (86184300).

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

64638204 is a wasteful number, since it uses less digits than its factorization.

64638204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5386524 (or 5386522 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 64638204 is about 8039.7888031963. The cubic root of 64638204 is about 401.3251964541.

The spelling of 64638204 in words is "sixty-four million, six hundred thirty-eight thousand, two hundred four".