138935118 has 64 divisors (see below), whose sum is σ = 347148288. Its totient is φ = 36149760.

The previous prime is 138935117. The next prime is 138935179. The reversal of 138935118 is 811539831.

138935118 = 137² + 138² + ... + 748².

It is a super-3 number, since 3×138935118³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138935117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18996 + ... + 25272.

It is an arithmetic number, because the mean of its divisors is an integer number (5424192).

Almost surely, 2^138935118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138935118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173574144).

138935118 is an abundant number, since it is smaller than the sum of its proper divisors (208213170).

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

138935118 is a wasteful number, since it uses less digits than its factorization.

138935118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6337.

The product of its digits is 25920, while the sum is 39.

The square root of 138935118 is about 11787.0741916728. The cubic root of 138935118 is about 517.9295357906.

The spelling of 138935118 in words is "one hundred thirty-eight million, nine hundred thirty-five thousand, one hundred eighteen".