9138996 has 72 divisors (see below), whose sum is σ = 24864840. Its totient is φ = 2820096.

The previous prime is 9138991. The next prime is 9139021. The reversal of 9138996 is 6998319.

9138996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3663396 + 5475600 = 1914^2 + 2340^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9138991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66640 + ... + 66776.

It is an arithmetic number, because the mean of its divisors is an integer number (345345).

Almost surely, 2^9138996 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 9138996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12432420).

9138996 is an abundant number, since it is smaller than the sum of its proper divisors (15725844).

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

9138996 is a wasteful number, since it uses less digits than its factorization.

9138996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 268 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 9138996 is about 3023.0772401644. The cubic root of 9138996 is about 209.0737436558.

The spelling of 9138996 in words is "nine million, one hundred thirty-eight thousand, nine hundred ninety-six".