138823756 has 12 divisors (see below), whose sum is σ = 243065592. Its totient is φ = 69376448.

The previous prime is 138823753. The next prime is 138823757. The reversal of 138823756 is 657328831.

138823756 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138823753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236 + ... + 16708.

It is an arithmetic number, because the mean of its divisors is an integer number (20255466).

Almost surely, 2^138823756 is an apocalyptic number.

It is an amenable number.

138823756 is a deficient number, since it is larger than the sum of its proper divisors (104241836).

138823756 is a wasteful number, since it uses less digits than its factorization.

138823756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17720 (or 17718 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 138823756 is about 11782.3493412816. The cubic root of 138823756 is about 517.7911184560.

The spelling of 138823756 in words is "one hundred thirty-eight million, eight hundred twenty-three thousand, seven hundred fifty-six".