44021664 has 48 divisors (see below), whose sum is σ = 128399040. Its totient is φ = 14673600.

The previous prime is 44021639. The next prime is 44021693. The reversal of 44021664 is 46612044.

44021664 is a `hidden beast` number, since 440 + 216 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24612 + ... + 26339.

It is an arithmetic number, because the mean of its divisors is an integer number (2674980).

Almost surely, 2^44021664 is an apocalyptic number.

It is an amenable number.

44021664 is an abundant number, since it is smaller than the sum of its proper divisors (84377376).

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

44021664 is a wasteful number, since it uses less digits than its factorization.

44021664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50970 (or 50956 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 44021664 is about 6634.8823651968. The cubic root of 44021664 is about 353.0927645307.

The spelling of 44021664 in words is "forty-four million, twenty-one thousand, six hundred sixty-four".