138782784888 has 128 divisors (see below), whose sum is σ = 435055968000. Its totient is φ = 40605183360.

The previous prime is 138782784857. The next prime is 138782784947. The reversal of 138782784888 is 888487287831.

138782784888 is a `hidden beast` number, since 1 + 3 + 8 + 78 + 2 + 78 + 488 + 8 = 666.

It is a super-2 number, since 2×138782784888² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 938170 + ... + 1075977.

It is an arithmetic number, because the mean of its divisors is an integer number (3398874750).

Almost surely, 2^138782784888 is an apocalyptic number.

138782784888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138782784888 is an abundant number, since it is smaller than the sum of its proper divisors (296273183112).

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

138782784888 is a wasteful number, since it uses less digits than its factorization.

138782784888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014202 (or 2014192 counting only the distinct ones).

The product of its digits is 308281344, while the sum is 72.

The spelling of 138782784888 in words is "one hundred thirty-eight billion, seven hundred eighty-two million, seven hundred eighty-four thousand, eight hundred eighty-eight".