138981096 has 80 divisors (see below), whose sum is σ = 392330400. Its totient is φ = 45963936.

The previous prime is 138981047. The next prime is 138981097. The reversal of 138981096 is 690189831.

It is a super-2 number, since 2×138981096² = 38631490090722432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138981097) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 89301 + ... + 90843.

It is an arithmetic number, because the mean of its divisors is an integer number (4904130).

Almost surely, 2^138981096 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138981096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196165200).

138981096 is an abundant number, since it is smaller than the sum of its proper divisors (253349304).

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

138981096 is a wasteful number, since it uses less digits than its factorization.

138981096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 138981096 is about 11789.0243871153. The cubic root of 138981096 is about 517.9866625467.

The spelling of 138981096 in words is "one hundred thirty-eight million, nine hundred eighty-one thousand, ninety-six".