44139385 has 4 divisors (see below), whose sum is σ = 52967268. Its totient is φ = 35311504.

The previous prime is 44139383. The next prime is 44139419. The reversal of 44139385 is 58393144.

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 31236921 + 12902464 = 5589^2 + 3592^2 .

It is a cyclic number.

It is not a de Polignac number, because 44139385 - 2¹ = 44139383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44139383) 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, 4413934 + ... + 4413943.

It is an arithmetic number, because the mean of its divisors is an integer number (13241817).

Almost surely, 2^44139385 is an apocalyptic number.

It is an amenable number.

44139385 is a deficient number, since it is larger than the sum of its proper divisors (8827883).

44139385 is an equidigital number, since it uses as much as digits as its factorization.

44139385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8827882.

The product of its digits is 51840, while the sum is 37.

The square root of 44139385 is about 6643.7478127936. The cubic root of 44139385 is about 353.4072266443.

The spelling of 44139385 in words is "forty-four million, one hundred thirty-nine thousand, three hundred eighty-five".