44439139 has 4 divisors (see below), whose sum is σ = 47053224. Its totient is φ = 41825056.

The previous prime is 44439079. The next prime is 44439163. The reversal of 44439139 is 93193444.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 44439139 - 2⁷ = 44439011 is a prime.

It is a super-2 number, since 2×44439139² = 3949674150122642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44439098 and 44439107.

It is not an unprimeable number, because it can be changed into a prime (44439739) 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, 1307017 + ... + 1307050.

It is an arithmetic number, because the mean of its divisors is an integer number (11763306).

Almost surely, 2^44439139 is an apocalyptic number.

44439139 is a deficient number, since it is larger than the sum of its proper divisors (2614085).

44439139 is a wasteful number, since it uses less digits than its factorization.

44439139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614084.

The product of its digits is 46656, while the sum is 37.

The square root of 44439139 is about 6666.2687464578. The cubic root of 44439139 is about 354.2054278100.

The spelling of 44439139 in words is "forty-four million, four hundred thirty-nine thousand, one hundred thirty-nine".