138883755 has 32 divisors (see below), whose sum is σ = 236116800. Its totient is φ = 69576192.

The previous prime is 138883649. The next prime is 138883757. The reversal of 138883755 is 557388831.

It is a happy number.

It is not a de Polignac number, because 138883755 - 2¹³ = 138875563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138883757) 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 31 ways as a sum of consecutive naturals, for example, 11781 + ... + 20409.

It is an arithmetic number, because the mean of its divisors is an integer number (7378650).

Almost surely, 2^138883755 is an apocalyptic number.

138883755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138883755 is a deficient number, since it is larger than the sum of its proper divisors (97233045).

138883755 is a wasteful number, since it uses less digits than its factorization.

138883755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8703.

The product of its digits is 806400, while the sum is 48.

The square root of 138883755 is about 11784.8952053041. The cubic root of 138883755 is about 517.8657033724.

The spelling of 138883755 in words is "one hundred thirty-eight million, eight hundred eighty-three thousand, seven hundred fifty-five".