44364639 has 32 divisors (see below), whose sum is σ = 68486400. Its totient is φ = 25263360.

The previous prime is 44364587. The next prime is 44364641. The reversal of 44364639 is 93646344.

It is a happy number.

It is not a de Polignac number, because 44364639 - 2¹² = 44360543 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 44364597 and 44364606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44363639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108267 + ... + 108675.

It is an arithmetic number, because the mean of its divisors is an integer number (2140200).

Almost surely, 2^44364639 is an apocalyptic number.

44364639 is a deficient number, since it is larger than the sum of its proper divisors (24121761).

44364639 is a wasteful number, since it uses less digits than its factorization.

44364639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615.

The product of its digits is 186624, while the sum is 39.

The square root of 44364639 is about 6660.6785690348. The cubic root of 44364639 is about 354.0073811861.

The spelling of 44364639 in words is "forty-four million, three hundred sixty-four thousand, six hundred thirty-nine".