64644244 has 12 divisors (see below), whose sum is σ = 129288544. Its totient is φ = 27704664.

The previous prime is 64644233. The next prime is 64644247. The reversal of 64644244 is 44244646.

64644244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

64644244 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64644247) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1154334 + ... + 1154389.

Almost surely, 2^64644244 is an apocalyptic number.

It is an amenable number.

64644244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64644244 is a wasteful number, since it uses less digits than its factorization.

64644244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308734 (or 2308732 counting only the distinct ones).

The product of its digits is 73728, while the sum is 34.

The square root of 64644244 is about 8040.1644261794. The cubic root of 64644244 is about 401.3376964337.

The spelling of 64644244 in words is "sixty-four million, six hundred forty-four thousand, two hundred forty-four".