138798108 has 18 divisors (see below), whose sum is σ = 350850864. Its totient is φ = 46266024.

The previous prime is 138798083. The next prime is 138798151. The reversal of 138798108 is 801897831.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1927716 + ... + 1927787.

Almost surely, 2^138798108 is an apocalyptic number.

138798108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138798108 is an abundant number, since it is smaller than the sum of its proper divisors (212052756).

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

138798108 is a wasteful number, since it uses less digits than its factorization.

138798108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855513 (or 3855508 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 138798108 is about 11781.2608832841. The cubic root of 138798108 is about 517.7592288022.

The spelling of 138798108 in words is "one hundred thirty-eight million, seven hundred ninety-eight thousand, one hundred eight".