12323520 has 168 divisors, whose sum is σ = 46360080. Its totient is φ = 2979840.

The previous prime is 12323513. The next prime is 12323537. The reversal of 12323520 is 2532321.

12323520 is a `hidden beast` number, since 123 + 23 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12323493 and 12323502.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31486 + ... + 31874.

Almost surely, 2^12323520 is an apocalyptic number.

12323520 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 12323520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23180040).

12323520 is an abundant number, since it is smaller than the sum of its proper divisors (34036560).

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

12323520 is a wasteful number, since it uses less digits than its factorization.

12323520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 12323520 is about 3510.4871456822. The cubic root of 12323520 is about 230.9820641609.

Adding to 12323520 its reverse (2532321), we get a palindrome (14855841).

The spelling of 12323520 in words is "twelve million, three hundred twenty-three thousand, five hundred twenty".