44643564 has 108 divisors (see below), whose sum is σ = 137226544. Its totient is φ = 11985408.

The previous prime is 44643553. The next prime is 44643569. The reversal of 44643564 is 46534644.

44643564 is a `hidden beast` number, since 4 + 4 + 643 + 5 + 6 + 4 = 666.

44643564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (44643569) 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 35 ways as a sum of consecutive naturals, for example, 72522 + ... + 73134.

Almost surely, 2^44643564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44643564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68613272).

44643564 is an abundant number, since it is smaller than the sum of its proper divisors (92582980).

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

44643564 is a wasteful number, since it uses less digits than its factorization.

44643564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 642 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

The square root of 44643564 is about 6681.5839439462. The cubic root of 44643564 is about 354.7477252840.

The spelling of 44643564 in words is "forty-four million, six hundred forty-three thousand, five hundred sixty-four".