8139444 has 24 divisors (see below), whose sum is σ = 19134528. Its totient is φ = 2692800.

The previous prime is 8139431. The next prime is 8139451. The reversal of 8139444 is 4449318.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 832 + ... + 4119.

It is an arithmetic number, because the mean of its divisors is an integer number (797272).

Almost surely, 2^8139444 is an apocalyptic number.

It is an amenable number.

8139444 is an abundant number, since it is smaller than the sum of its proper divisors (10995084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8139444 is a wasteful number, since it uses less digits than its factorization.

8139444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5095 (or 5093 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 8139444 is about 2852.9710829239. The cubic root of 8139444 is about 201.1553463558.

The spelling of 8139444 in words is "eight million, one hundred thirty-nine thousand, four hundred forty-four".