44400013 has 8 divisors (see below), whose sum is σ = 50792832. Its totient is φ = 38019696.

The previous prime is 44400001. The next prime is 44400023. The reversal of 44400013 is 31000444.

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 44400013 - 2⁵ = 44399981 is a prime.

It is a super-2 number, since 2×44400013² = 3942722308800338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 44400013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44400023) 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, 6456 + ... + 11422.

It is an arithmetic number, because the mean of its divisors is an integer number (6349104).

Almost surely, 2^44400013 is an apocalyptic number.

It is an amenable number.

44400013 is a deficient number, since it is larger than the sum of its proper divisors (6392819).

44400013 is a wasteful number, since it uses less digits than its factorization.

44400013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6251.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 44400013 is about 6663.3334750709. Note that the first 3 decimals coincide. The cubic root of 44400013 is about 354.1014450664.

Adding to 44400013 its reverse (31000444), we get a palindrome (75400457).

The spelling of 44400013 in words is "forty-four million, four hundred thousand, thirteen".