138369996 has 18 divisors (see below), whose sum is σ = 349768692. Its totient is φ = 46123320.

The previous prime is 138369977. The next prime is 138369997. The reversal of 138369996 is 699963831.

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

It is not an unprimeable number, because it can be changed into a prime (138369997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1921770 + ... + 1921841.

It is an arithmetic number, because the mean of its divisors is an integer number (19431594).

Almost surely, 2^138369996 is an apocalyptic number.

It is an amenable number.

138369996 is an abundant number, since it is smaller than the sum of its proper divisors (211398696).

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

138369996 is a wasteful number, since it uses less digits than its factorization.

138369996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843621 (or 3843616 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 138369996 is about 11763.0776585042. The cubic root of 138369996 is about 517.2263511569.

It can be divided in two parts, 13836 and 9996, that added together give a palindrome (23832).

The spelling of 138369996 in words is "one hundred thirty-eight million, three hundred sixty-nine thousand, nine hundred ninety-six".