138313860 has 48 divisors (see below), whose sum is σ = 389772096. Its totient is φ = 36646272.

The previous prime is 138313831. The next prime is 138313883. The reversal of 138313860 is 68313831.

It is a happy number.

138313860 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2079 + ... + 16761.

It is an arithmetic number, because the mean of its divisors is an integer number (8120252).

Almost surely, 2^138313860 is an apocalyptic number.

138313860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138313860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194886048).

138313860 is an abundant number, since it is smaller than the sum of its proper divisors (251458236).

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

138313860 is a wasteful number, since it uses less digits than its factorization.

138313860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14852 (or 14850 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 138313860 is about 11760.6913062116. The cubic root of 138313860 is about 517.1563963338.

The spelling of 138313860 in words is "one hundred thirty-eight million, three hundred thirteen thousand, eight hundred sixty".