138390027930 has 256 divisors, whose sum is σ = 460894924800. Its totient is φ = 28706814720.

The previous prime is 138390027917. The next prime is 138390028009. The reversal of 138390027930 is 39720093831.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12738841 + ... + 12749699.

It is an arithmetic number, because the mean of its divisors is an integer number (1800370800).

Almost surely, 2^138390027930 is an apocalyptic number.

138390027930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138390027930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230447462400).

138390027930 is an abundant number, since it is smaller than the sum of its proper divisors (322504896870).

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

138390027930 is a wasteful number, since it uses less digits than its factorization.

138390027930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11506 (or 11500 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 138390027930 in words is "one hundred thirty-eight billion, three hundred ninety million, twenty-seven thousand, nine hundred thirty".