8139938 has 16 divisors (see below), whose sum is σ = 12503040. Its totient is φ = 3973536.

The previous prime is 8139919. The next prime is 8139959. The reversal of 8139938 is 8399318.

It is a junction number, because it is equal to n+sod(n) for n = 8139895 and 8139904.

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 7 ways as a sum of consecutive naturals, for example, 18323 + ... + 18761.

It is an arithmetic number, because the mean of its divisors is an integer number (781440).

Almost surely, 2^8139938 is an apocalyptic number.

8139938 is a deficient number, since it is larger than the sum of its proper divisors (4363102).

8139938 is a wasteful number, since it uses less digits than its factorization.

8139938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641.

The product of its digits is 46656, while the sum is 41.

The square root of 8139938 is about 2853.0576580224. The cubic root of 8139938 is about 201.1594157873.

The spelling of 8139938 in words is "eight million, one hundred thirty-nine thousand, nine hundred thirty-eight".