138286755 has 48 divisors (see below), whose sum is σ = 255584160. Its totient is φ = 68926464.

The previous prime is 138286739. The next prime is 138286763. The reversal of 138286755 is 557682831.

It is not a de Polignac number, because 138286755 - 2⁴ = 138286739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 138286755.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 124141 + ... + 125249.

It is an arithmetic number, because the mean of its divisors is an integer number (5324670).

Almost surely, 2^138286755 is an apocalyptic number.

138286755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138286755 is a deficient number, since it is larger than the sum of its proper divisors (117297405).

138286755 is a wasteful number, since it uses less digits than its factorization.

138286755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300 (or 1297 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 138286755 is about 11759.5388940213. The cubic root of 138286755 is about 517.1226122048.

The spelling of 138286755 in words is "one hundred thirty-eight million, two hundred eighty-six thousand, seven hundred fifty-five".