138813882 has 32 divisors (see below), whose sum is σ = 281428992. Its totient is φ = 45641904.

The previous prime is 138813881. The next prime is 138813893. The reversal of 138813882 is 288318831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138813881) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 297013 + ... + 297479.

It is an arithmetic number, because the mean of its divisors is an integer number (8794656).

Almost surely, 2^138813882 is an apocalyptic number.

138813882 is an abundant number, since it is smaller than the sum of its proper divisors (142615110).

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

138813882 is a wasteful number, since it uses less digits than its factorization.

138813882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042.

The product of its digits is 73728, while the sum is 42.

The square root of 138813882 is about 11781.9303172273. The cubic root of 138813882 is about 517.7788420011.

The spelling of 138813882 in words is "one hundred thirty-eight million, eight hundred thirteen thousand, eight hundred eighty-two".