9138140 has 48 divisors (see below), whose sum is σ = 21258720. Its totient is φ = 3271680.

The previous prime is 9138139. The next prime is 9138169. The reversal of 9138140 is 418319.

It is a congruent number.

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, 15776 + ... + 16344.

It is an arithmetic number, because the mean of its divisors is an integer number (442890).

Almost surely, 2^9138140 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 9138140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10629360).

9138140 is an abundant number, since it is smaller than the sum of its proper divisors (12120580).

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

9138140 is a wasteful number, since it uses less digits than its factorization.

9138140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 9138140 is about 3022.9356592558. The cubic root of 9138140 is about 209.0672158523.

The spelling of 9138140 in words is "nine million, one hundred thirty-eight thousand, one hundred forty".