138884 has 6 divisors (see below), whose sum is σ = 243054. Its totient is φ = 69440.

The previous prime is 138883. The next prime is 138889. The reversal of 138884 is 488831.

138884 is nontrivially palindromic in base 6.

It can be written as a sum of positive squares in only one way, i.e., 122500 + 16384 = 350^2 + 128^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138884.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138884.

It is not an unprimeable number, because it can be changed into a prime (138883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17357 + ... + 17364.

It is an arithmetic number, because the mean of its divisors is an integer number (40509).

2¹³⁸⁸⁸⁴ is an apocalyptic number.

It is an amenable number.

138884 is a deficient number, since it is larger than the sum of its proper divisors (104170).

138884 is a wasteful number, since it uses less digits than its factorization.

138884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34725 (or 34723 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 138884 is about 372.6714370595. The cubic root of 138884 is about 51.7866007889.

The spelling of 138884 in words is "one hundred thirty-eight thousand, eight hundred eighty-four".