138801612 has 54 divisors (see below), whose sum is σ = 343733628. Its totient is φ = 43587216.

The previous prime is 138801589. The next prime is 138801671. The reversal of 138801612 is 216108831.

It is a self number, because there is not a number n which added to its sum of digits gives 138801612.

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 17 ways as a sum of consecutive naturals, for example, 775339 + ... + 775517.

Almost surely, 2^138801612 is an apocalyptic number.

138801612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138801612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171866814).

138801612 is an abundant number, since it is smaller than the sum of its proper divisors (204932016).

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

138801612 is a wasteful number, since it uses less digits than its factorization.

138801612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 138801612 is about 11781.4095930835. The cubic root of 138801612 is about 517.7635857614.

The spelling of 138801612 in words is "one hundred thirty-eight million, eight hundred one thousand, six hundred twelve".