44399965 has 4 divisors (see below), whose sum is σ = 53279964. Its totient is φ = 35519968.

The previous prime is 44399933. The next prime is 44399977. The reversal of 44399965 is 56999344.

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 20848356 + 23551609 = 4566^2 + 4853^2 .

It is a cyclic number.

It is not a de Polignac number, because 44399965 - 2⁵ = 44399933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4439992 + ... + 4440001.

It is an arithmetic number, because the mean of its divisors is an integer number (13319991).

Almost surely, 2^44399965 is an apocalyptic number.

It is an amenable number.

44399965 is a deficient number, since it is larger than the sum of its proper divisors (8879999).

44399965 is an equidigital number, since it uses as much as digits as its factorization.

44399965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8879998.

The product of its digits is 1049760, while the sum is 49.

The square root of 44399965 is about 6663.3298732691. The cubic root of 44399965 is about 354.1013174622.

The spelling of 44399965 in words is "forty-four million, three hundred ninety-nine thousand, nine hundred sixty-five".