138982838 has 4 divisors (see below), whose sum is σ = 208474260. Its totient is φ = 69491418.

The previous prime is 138982817. The next prime is 138982843. The reversal of 138982838 is 838289831.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34745708 + ... + 34745711.

It is an arithmetic number, because the mean of its divisors is an integer number (52118565).

Almost surely, 2^138982838 is an apocalyptic number.

138982838 is a deficient number, since it is larger than the sum of its proper divisors (69491422).

138982838 is an equidigital number, since it uses as much as digits as its factorization.

138982838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69491421.

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

The square root of 138982838 is about 11789.0982691638. The cubic root of 138982838 is about 517.9888266996.

The spelling of 138982838 in words is "one hundred thirty-eight million, nine hundred eighty-two thousand, eight hundred thirty-eight".