44408021 has 4 divisors (see below), whose sum is σ = 50752032. Its totient is φ = 38064012.

The previous prime is 44408003. The next prime is 44408041. The reversal of 44408021 is 12080444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-44408021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44408041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3171995 + ... + 3172008.

It is an arithmetic number, because the mean of its divisors is an integer number (12688008).

Almost surely, 2^44408021 is an apocalyptic number.

It is an amenable number.

44408021 is a deficient number, since it is larger than the sum of its proper divisors (6344011).

44408021 is an equidigital number, since it uses as much as digits as its factorization.

44408021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6344010.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 44408021 is about 6663.9343484161. The cubic root of 44408021 is about 354.1227324018.

Adding to 44408021 its reverse (12080444), we get a palindrome (56488465).

The spelling of 44408021 in words is "forty-four million, four hundred eight thousand, twenty-one".