138330915 has 8 divisors (see below), whose sum is σ = 221329488. Its totient is φ = 73776480.

The previous prime is 138330911. The next prime is 138330923. The reversal of 138330915 is 519033831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138330915 - 2² = 138330911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138330911) 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 7 ways as a sum of consecutive naturals, for example, 4611016 + ... + 4611045.

It is an arithmetic number, because the mean of its divisors is an integer number (27666186).

Almost surely, 2^138330915 is an apocalyptic number.

138330915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138330915 is a deficient number, since it is larger than the sum of its proper divisors (82998573).

138330915 is an equidigital number, since it uses as much as digits as its factorization.

138330915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9222069.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 138330915 is about 11761.4163687882. The cubic root of 138330915 is about 517.1776517111.

The spelling of 138330915 in words is "one hundred thirty-eight million, three hundred thirty thousand, nine hundred fifteen".