138113140 has 24 divisors (see below), whose sum is σ = 316405152. Its totient is φ = 50222880.

The previous prime is 138113111. The next prime is 138113141. The reversal of 138113140 is 41311831.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138113141) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 313674 + ... + 314113.

It is an arithmetic number, because the mean of its divisors is an integer number (13183548).

Almost surely, 2^138113140 is an apocalyptic number.

138113140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138113140 is an abundant number, since it is smaller than the sum of its proper divisors (178292012).

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

138113140 is a wasteful number, since it uses less digits than its factorization.

138113140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627807 (or 627805 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 138113140 is about 11752.1546960547. The cubic root of 138113140 is about 516.9061107746.

Adding to 138113140 its reverse (41311831), we get a palindrome (179424971).

The spelling of 138113140 in words is "one hundred thirty-eight million, one hundred thirteen thousand, one hundred forty".