138117378 has 24 divisors (see below), whose sum is σ = 321334992. Its totient is φ = 39462024.

The previous prime is 138117377. The next prime is 138117379. The reversal of 138117378 is 873711831.

It is an interprime number because it is at equal distance from previous prime (138117377) and next prime (138117379).

It is not an unprimeable number, because it can be changed into a prime (138117373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234600 + ... + 235187.

It is an arithmetic number, because the mean of its divisors is an integer number (13388958).

Almost surely, 2^138117378 is an apocalyptic number.

138117378 is an abundant number, since it is smaller than the sum of its proper divisors (183217614).

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

138117378 is a wasteful number, since it uses less digits than its factorization.

138117378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469806 (or 469799 counting only the distinct ones).

The product of its digits is 28224, while the sum is 39.

The square root of 138117378 is about 11752.3350020326. The cubic root of 138117378 is about 516.9113978064.

The spelling of 138117378 in words is "one hundred thirty-eight million, one hundred seventeen thousand, three hundred seventy-eight".