44639989 has 8 divisors (see below), whose sum is σ = 45924480. Its totient is φ = 43369536.

The previous prime is 44639971. The next prime is 44639993. The reversal of 44639989 is 98993644.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 44639989 - 2⁵ = 44639957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44639929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3117 + ... + 9949.

It is an arithmetic number, because the mean of its divisors is an integer number (5740560).

Almost surely, 2^44639989 is an apocalyptic number.

It is an amenable number.

44639989 is a deficient number, since it is larger than the sum of its proper divisors (1284491).

44639989 is a wasteful number, since it uses less digits than its factorization.

44639989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7019.

The product of its digits is 1679616, while the sum is 52.

The square root of 44639989 is about 6681.3164122050. The cubic root of 44639989 is about 354.7382557819.

The spelling of 44639989 in words is "forty-four million, six hundred thirty-nine thousand, nine hundred eighty-nine".