44139538 has 4 divisors (see below), whose sum is σ = 66209310. Its totient is φ = 22069768.

The previous prime is 44139509. The next prime is 44139541. The reversal of 44139538 is 83593144.

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

It can be written as a sum of positive squares in only one way, i.e., 43125489 + 1014049 = 6567^2 + 1007^2 .

It is a junction number, because it is equal to n+sod(n) for n = 44139497 and 44139506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11034883 + ... + 11034886.

Almost surely, 2^44139538 is an apocalyptic number.

44139538 is a deficient number, since it is larger than the sum of its proper divisors (22069772).

44139538 is a wasteful number, since it uses less digits than its factorization.

44139538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22069771.

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

The square root of 44139538 is about 6643.7593273688. The cubic root of 44139538 is about 353.4076349814.

The spelling of 44139538 in words is "forty-four million, one hundred thirty-nine thousand, five hundred thirty-eight".