138728439000 has 96 divisors (see below), whose sum is σ = 468902154240. Its totient is φ = 36994248000.

The previous prime is 138728438999. The next prime is 138728439041. The reversal of 138728439000 is 934827831.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7698136 + ... + 7716135.

It is an arithmetic number, because the mean of its divisors is an integer number (4884397440).

Almost surely, 2^138728439000 is an apocalyptic number.

138728439000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138728439000 is an abundant number, since it is smaller than the sum of its proper divisors (330173715240).

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

138728439000 is a wasteful number, since it uses less digits than its factorization.

138728439000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15414298 (or 15414281 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 138728439000 in words is "one hundred thirty-eight billion, seven hundred twenty-eight million, four hundred thirty-nine thousand".