64636244 has 48 divisors (see below), whose sum is σ = 125874000. Its totient is φ = 28901376.

The previous prime is 64636223. The next prime is 64636259. The reversal of 64636244 is 44263646.

64636244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 3952144 + 60684100 = 1988^2 + 7790^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143732 + ... + 144180.

It is an arithmetic number, because the mean of its divisors is an integer number (2622375).

Almost surely, 2^64636244 is an apocalyptic number.

It is an amenable number.

64636244 is a deficient number, since it is larger than the sum of its proper divisors (61237756).

64636244 is a wasteful number, since it uses less digits than its factorization.

64636244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 570 counting only the distinct ones).

The product of its digits is 82944, while the sum is 35.

The square root of 64636244 is about 8039.6669085230. Note that the first 3 decimals coincide. The cubic root of 64636244 is about 401.3211400020.

The spelling of 64636244 in words is "sixty-four million, six hundred thirty-six thousand, two hundred forty-four".