138798036 has 120 divisors (see below), whose sum is σ = 403741184. Its totient is φ = 41290560.

The previous prime is 138798019. The next prime is 138798041. The reversal of 138798036 is 630897831.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 138797982 and 138798000.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 130041 + ... + 131103.

Almost surely, 2^138798036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138798036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201870592).

138798036 is an abundant number, since it is smaller than the sum of its proper divisors (264943148).

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

138798036 is a wasteful number, since it uses less digits than its factorization.

138798036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 138798036 is about 11781.2578275836. The cubic root of 138798036 is about 517.7591392749.

The spelling of 138798036 in words is "one hundred thirty-eight million, seven hundred ninety-eight thousand, thirty-six".