138244812 has 24 divisors (see below), whose sum is σ = 336596736. Its totient is φ = 44077968.

The previous prime is 138244807. The next prime is 138244823. The reversal of 138244812 is 218442831.

138244812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138244812² = 38223256089830688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250168 + ... + 250719.

It is an arithmetic number, because the mean of its divisors is an integer number (14024864).

Almost surely, 2^138244812 is an apocalyptic number.

138244812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138244812 is an abundant number, since it is smaller than the sum of its proper divisors (198351924).

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

138244812 is a wasteful number, since it uses less digits than its factorization.

138244812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500917 (or 500915 counting only the distinct ones).

The product of its digits is 12288, while the sum is 33.

The square root of 138244812 is about 11757.7553980341. The cubic root of 138244812 is about 517.0703250402.

The spelling of 138244812 in words is "one hundred thirty-eight million, two hundred forty-four thousand, eight hundred twelve".