44394921 has 6 divisors (see below), whose sum is σ = 64126010. Its totient is φ = 29596608.

The previous prime is 44394913. The next prime is 44394941. The reversal of 44394921 is 12949344.

44394921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 41024025 + 3370896 = 6405^2 + 1836^2 .

It is not a de Polignac number, because 44394921 - 2³ = 44394913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44394901) 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 5 ways as a sum of consecutive naturals, for example, 2466376 + ... + 2466393.

Almost surely, 2^44394921 is an apocalyptic number.

It is an amenable number.

44394921 is a deficient number, since it is larger than the sum of its proper divisors (19731089).

44394921 is a wasteful number, since it uses less digits than its factorization.

44394921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932775 (or 4932772 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 44394921 is about 6662.9513730778. The cubic root of 44394921 is about 354.0879078819.

The spelling of 44394921 in words is "forty-four million, three hundred ninety-four thousand, nine hundred twenty-one".