44398709 has 4 divisors (see below), whose sum is σ = 44466540. Its totient is φ = 44330880.

The previous prime is 44398699. The next prime is 44398721. The reversal of 44398709 is 90789344.

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 21883684 + 22515025 = 4678^2 + 4745^2 .

It is a cyclic number.

It is not a de Polignac number, because 44398709 - 2⁴ = 44398693 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 44398709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44398759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32924 + ... + 34245.

It is an arithmetic number, because the mean of its divisors is an integer number (11116635).

Almost surely, 2^44398709 is an apocalyptic number.

It is an amenable number.

44398709 is a deficient number, since it is larger than the sum of its proper divisors (67831).

44398709 is an equidigital number, since it uses as much as digits as its factorization.

44398709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67830.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 44398709 is about 6663.2356254300. The cubic root of 44398709 is about 354.0979784547.

The spelling of 44398709 in words is "forty-four million, three hundred ninety-eight thousand, seven hundred nine".