44421989 has 4 divisors (see below), whose sum is σ = 44449356. Its totient is φ = 44394624.

The previous prime is 44421959. The next prime is 44422009. The reversal of 44421989 is 98912444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17724100 + 26697889 = 4210^2 + 5167^2 .

It is a cyclic number.

It is not a de Polignac number, because 44421989 - 2⁸ = 44421733 is a prime.

It is a super-2 number, since 2×44421989² = 3946626213432242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44421919) 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, 11084 + ... + 14549.

It is an arithmetic number, because the mean of its divisors is an integer number (11112339).

Almost surely, 2^44421989 is an apocalyptic number.

It is an amenable number.

44421989 is a deficient number, since it is larger than the sum of its proper divisors (27367).

44421989 is a wasteful number, since it uses less digits than its factorization.

44421989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27366.

The product of its digits is 82944, while the sum is 41.

The square root of 44421989 is about 6664.9822955504. The cubic root of 44421989 is about 354.1598568348.

The spelling of 44421989 in words is "forty-four million, four hundred twenty-one thousand, nine hundred eighty-nine".