138839882 has 8 divisors (see below), whose sum is σ = 208317252. Its totient is φ = 69400800.

The previous prime is 138839797. The next prime is 138839933. The reversal of 138839882 is 288938831.

It can be written as a sum of positive squares in 2 ways, for example, as 136212241 + 2627641 = 11671^2 + 1621^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 138839882.

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, 2582 + ... + 16862.

Almost surely, 2^138839882 is an apocalyptic number.

138839882 is a deficient number, since it is larger than the sum of its proper divisors (69477370).

138839882 is a wasteful number, since it uses less digits than its factorization.

138839882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19144.

The product of its digits is 663552, while the sum is 50.

The square root of 138839882 is about 11783.0336501259. The cubic root of 138839882 is about 517.8111668409.

The spelling of 138839882 in words is "one hundred thirty-eight million, eight hundred thirty-nine thousand, eight hundred eighty-two".