44448021 has 20 divisors (see below), whose sum is σ = 67316172. Its totient is φ = 29222208.

The previous prime is 44447999. The next prime is 44448023. The reversal of 44448021 is 12084444.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 34751025 + 9696996 = 5895^2 + 3114^2 .

It is not a de Polignac number, because 44448021 - 2⁶ = 44447957 is a prime.

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 (44448023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2155 + ... + 9671.

Almost surely, 2^44448021 is an apocalyptic number.

It is an amenable number.

44448021 is a deficient number, since it is larger than the sum of its proper divisors (22868151).

44448021 is an equidigital number, since it uses as much as digits as its factorization.

44448021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7602 (or 7593 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 44448021 is about 6666.9349029370. The cubic root of 44448021 is about 354.2290244495.

The spelling of 44448021 in words is "forty-four million, four hundred forty-eight thousand, twenty-one".