44139388 has 6 divisors (see below), whose sum is σ = 77243936. Its totient is φ = 22069692.

The previous prime is 44139383. The next prime is 44139419. The reversal of 44139388 is 88393144.

It is a self number, because there is not a number n which added to its sum of digits gives 44139388.

It is a congruent 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 as a sum of consecutive naturals, namely, 5517420 + ... + 5517427.

Almost surely, 2^44139388 is an apocalyptic number.

It is an amenable number.

44139388 is a deficient number, since it is larger than the sum of its proper divisors (33104548).

44139388 is a wasteful number, since it uses less digits than its factorization.

44139388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11034851 (or 11034849 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 44139388 is about 6643.7480385698. The cubic root of 44139388 is about 353.4072346509.

The spelling of 44139388 in words is "forty-four million, one hundred thirty-nine thousand, three hundred eighty-eight".