138361244 has 24 divisors (see below), whose sum is σ = 276971520. Its totient is φ = 59244336.

The previous prime is 138361243. The next prime is 138361259. The reversal of 138361244 is 442163831.

It is a self number, because there is not a number n which added to its sum of digits gives 138361244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138361243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60677 + ... + 62915.

It is an arithmetic number, because the mean of its divisors is an integer number (11540480).

Almost surely, 2^138361244 is an apocalyptic number.

138361244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138361244 is an abundant number, since it is smaller than the sum of its proper divisors (138610276).

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

138361244 is a wasteful number, since it uses less digits than its factorization.

138361244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457 (or 4455 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 138361244 is about 11762.7056411355. The cubic root of 138361244 is about 517.2154459496.

The spelling of 138361244 in words is "one hundred thirty-eight million, three hundred sixty-one thousand, two hundred forty-four".