44440639 has 16 divisors (see below), whose sum is σ = 48660480. Its totient is φ = 40430880.

The previous prime is 44440579. The next prime is 44440651. The reversal of 44440639 is 93604444.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 44440639 - 2¹⁹ = 43916351 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 (44440139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115842 + ... + 116224.

It is an arithmetic number, because the mean of its divisors is an integer number (3041280).

Almost surely, 2^44440639 is an apocalyptic number.

44440639 is a deficient number, since it is larger than the sum of its proper divisors (4219841).

44440639 is a wasteful number, since it uses less digits than its factorization.

44440639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 44440639 is about 6666.3812522237. The cubic root of 44440639 is about 354.2094130519.

The spelling of 44440639 in words is "forty-four million, four hundred forty thousand, six hundred thirty-nine".