44512139 has 10 divisors (see below), whose sum is σ = 51930540. Its totient is φ = 38151204.

The previous prime is 44512093. The next prime is 44512141. The reversal of 44512139 is 93121544.

It is not a de Polignac number, because 44512139 - 2¹² = 44508043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44512339) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6869 + ... + 11670.

It is an arithmetic number, because the mean of its divisors is an integer number (5193054).

Almost surely, 2^44512139 is an apocalyptic number.

44512139 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

44512139 is a deficient number, since it is larger than the sum of its proper divisors (7418401).

44512139 is an frugal number, since it uses more digits than its factorization.

44512139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18567 (or 18546 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 44512139 is about 6671.7418265398. The cubic root of 44512139 is about 354.3992723303.

The spelling of 44512139 in words is "forty-four million, five hundred twelve thousand, one hundred thirty-nine".