138334881 has 16 divisors (see below), whose sum is σ = 188006400. Its totient is φ = 90450768.

The previous prime is 138334879. The next prime is 138334907. The reversal of 138334881 is 188433831.

It is not a de Polignac number, because 138334881 - 2¹ = 138334879 is a prime.

It is a super-2 number, since 2×138334881² = 38273078602568322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138334841) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 126720 + ... + 127806.

It is an arithmetic number, because the mean of its divisors is an integer number (11750400).

Almost surely, 2^138334881 is an apocalyptic number.

It is an amenable number.

138334881 is a deficient number, since it is larger than the sum of its proper divisors (49671519).

138334881 is a wasteful number, since it uses less digits than its factorization.

138334881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868.

The product of its digits is 55296, while the sum is 39.

The square root of 138334881 is about 11761.5849697224. The cubic root of 138334881 is about 517.1825942239.

The spelling of 138334881 in words is "one hundred thirty-eight million, three hundred thirty-four thousand, eight hundred eighty-one".