138805044 has 36 divisors (see below), whose sum is σ = 376758144. Its totient is φ = 39658416.

The previous prime is 138805027. The next prime is 138805057. The reversal of 138805044 is 440508831.

It is a junction number, because it is equal to n+sod(n) for n = 138804996 and 138805014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117444 + ... + 118619.

It is an arithmetic number, because the mean of its divisors is an integer number (10465504).

Almost surely, 2^138805044 is an apocalyptic number.

138805044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138805044 is an abundant number, since it is smaller than the sum of its proper divisors (237953100).

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

138805044 is a wasteful number, since it uses less digits than its factorization.

138805044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236084 (or 236075 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 138805044 is about 11781.5552453825. Note that the first 3 decimals coincide. The cubic root of 138805044 is about 517.7678531229.

The spelling of 138805044 in words is "one hundred thirty-eight million, eight hundred five thousand, forty-four".