138814836 has 48 divisors (see below), whose sum is σ = 348902400. Its totient is φ = 42813792.

The previous prime is 138814801. The next prime is 138814849. The reversal of 138814836 is 638418831.

It is a hoax number, since the sum of its digits (42) 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2725 + ... + 16883.

It is an arithmetic number, because the mean of its divisors is an integer number (7268800).

Almost surely, 2^138814836 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 138814836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174451200).

138814836 is an abundant number, since it is smaller than the sum of its proper divisors (210087564).

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

138814836 is a wasteful number, since it uses less digits than its factorization.

138814836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14228 (or 14226 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 138814836 is about 11781.9708028835. The cubic root of 138814836 is about 517.7800281454.

The spelling of 138814836 in words is "one hundred thirty-eight million, eight hundred fourteen thousand, eight hundred thirty-six".