8139944 has 16 divisors (see below), whose sum is σ = 15296820. Its totient is φ = 4060800.

The previous prime is 8139919. The next prime is 8139959. The reversal of 8139944 is 4499318.

It can be written as a sum of positive squares in 2 ways, for example, as 8008900 + 131044 = 2830^2 + 362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8139898 and 8139907.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3962 + ... + 5654.

Almost surely, 2^8139944 is an apocalyptic number.

It is an amenable number.

8139944 is a deficient number, since it is larger than the sum of its proper divisors (7156876).

8139944 is a wasteful number, since it uses less digits than its factorization.

8139944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300 (or 2296 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 8139944 is about 2853.0587095256. The cubic root of 8139944 is about 201.1594652126.

The spelling of 8139944 in words is "eight million, one hundred thirty-nine thousand, nine hundred forty-four".