44121564 has 24 divisors (see below), whose sum is σ = 114389520. Its totient is φ = 14707152.

The previous prime is 44121563. The next prime is 44121589. The reversal of 44121564 is 46512144.

44121564 is a `hidden beast` number, since 441 + 215 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44121563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204159 + ... + 204374.

It is an arithmetic number, because the mean of its divisors is an integer number (4766230).

Almost surely, 2^44121564 is an apocalyptic number.

It is an amenable number.

44121564 is an abundant number, since it is smaller than the sum of its proper divisors (70267956).

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

44121564 is a wasteful number, since it uses less digits than its factorization.

44121564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408546 (or 408538 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 44121564 is about 6642.4064916264. The cubic root of 44121564 is about 353.3596582578.

The spelling of 44121564 in words is "forty-four million, one hundred twenty-one thousand, five hundred sixty-four".