8523138 has 32 divisors (see below), whose sum is σ = 18539136. Its totient is φ = 2596608.

The previous prime is 8523131. The next prime is 8523139. The reversal of 8523138 is 8313258.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8523131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8331 + ... + 9297.

It is an arithmetic number, because the mean of its divisors is an integer number (579348).

Almost surely, 2^8523138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8523138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9269568).

8523138 is an abundant number, since it is smaller than the sum of its proper divisors (10015998).

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

8523138 is a wasteful number, since it uses less digits than its factorization.

8523138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098.

The product of its digits is 5760, while the sum is 30.

The square root of 8523138 is about 2919.4413849228. The cubic root of 8523138 is about 204.2677664128.

The spelling of 8523138 in words is "eight million, five hundred twenty-three thousand, one hundred thirty-eight".