9138528 has 96 divisors (see below), whose sum is σ = 30481920. Its totient is φ = 2609280.

The previous prime is 9138527. The next prime is 9138533. The reversal of 9138528 is 8258319.

It is a Cunningham number, because it is equal to 3023²-1.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 9138492 and 9138501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9138523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5293 + ... + 6803.

It is an arithmetic number, because the mean of its divisors is an integer number (317520).

Almost surely, 2^9138528 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 9138528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15240960).

9138528 is an abundant number, since it is smaller than the sum of its proper divisors (21343392).

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

9138528 is a wasteful number, since it uses less digits than its factorization.

9138528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537 (or 1523 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 9138528 is about 3022.9998346014. Note that the first 3 decimals coincide. The cubic root of 9138528 is about 209.0701747670.

The spelling of 9138528 in words is "nine million, one hundred thirty-eight thousand, five hundred twenty-eight".