44418581 has 4 divisors (see below), whose sum is σ = 44438592. Its totient is φ = 44398572.

The previous prime is 44418571. The next prime is 44418587. The reversal of 44418581 is 18581444.

It is a happy number.

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 cyclic number.

It is not a de Polignac number, because 44418581 - 2²² = 40224277 is a prime.

It is a super-2 number, since 2×44418581² = 3946020676107122, 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 (44418587) 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, 6191 + ... + 11276.

It is an arithmetic number, because the mean of its divisors is an integer number (11109648).

Almost surely, 2^44418581 is an apocalyptic number.

It is an amenable number.

44418581 is a deficient number, since it is larger than the sum of its proper divisors (20011).

44418581 is a wasteful number, since it uses less digits than its factorization.

44418581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20010.

The product of its digits is 20480, while the sum is 35.

The square root of 44418581 is about 6664.7266260515. The cubic root of 44418581 is about 354.1507997013.

The spelling of 44418581 in words is "forty-four million, four hundred eighteen thousand, five hundred eighty-one".