138498318 has 48 divisors (see below), whose sum is σ = 357866496. Its totient is φ = 37849680.

The previous prime is 138498307. The next prime is 138498323. The reversal of 138498318 is 813894831.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20998 + ... + 26793.

It is an arithmetic number, because the mean of its divisors is an integer number (7455552).

Almost surely, 2^138498318 is an apocalyptic number.

138498318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138498318 is an abundant number, since it is smaller than the sum of its proper divisors (219368178).

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

138498318 is a wasteful number, since it uses less digits than its factorization.

138498318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47829 (or 47826 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 138498318 is about 11768.5308343905. The cubic root of 138498318 is about 517.3861907538.

The spelling of 138498318 in words is "one hundred thirty-eight million, four hundred ninety-eight thousand, three hundred eighteen".