39139444 has 24 divisors (see below), whose sum is σ = 71769600. Its totient is φ = 18651360.

The previous prime is 39139409. The next prime is 39139447. The reversal of 39139444 is 44493193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39139447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7029 + ... + 11299.

It is an arithmetic number, because the mean of its divisors is an integer number (2990400).

Almost surely, 2^39139444 is an apocalyptic number.

It is an amenable number.

39139444 is a deficient number, since it is larger than the sum of its proper divisors (32630156).

39139444 is a wasteful number, since it uses less digits than its factorization.

39139444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4383 (or 4381 counting only the distinct ones).

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

The square root of 39139444 is about 6256.1524917476. The cubic root of 39139444 is about 339.5248379837.

The spelling of 39139444 in words is "thirty-nine million, one hundred thirty-nine thousand, four hundred forty-four".