44390813 has 8 divisors (see below), whose sum is σ = 45064416. Its totient is φ = 43722000.

The previous prime is 44390803. The next prime is 44390831. The reversal of 44390813 is 31809344.

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 44390813 - 2⁸ = 44390557 is a prime.

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 44390813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44390803) 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, 20270 + ... + 22352.

It is an arithmetic number, because the mean of its divisors is an integer number (5633052).

Almost surely, 2^44390813 is an apocalyptic number.

It is an amenable number.

44390813 is a deficient number, since it is larger than the sum of its proper divisors (673603).

44390813 is a wasteful number, since it uses less digits than its factorization.

44390813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 44390813 is about 6662.6430941481. The cubic root of 44390813 is about 354.0769859269.

The spelling of 44390813 in words is "forty-four million, three hundred ninety thousand, eight hundred thirteen".