12815528 has 32 divisors (see below), whose sum is σ = 26429760. Its totient is φ = 5777280.

The previous prime is 12815503. The next prime is 12815533. The reversal of 12815528 is 82551821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12815494 and 12815503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11525 + ... + 12587.

It is an arithmetic number, because the mean of its divisors is an integer number (825930).

Almost surely, 2^12815528 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 12815528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13214880).

12815528 is an abundant number, since it is smaller than the sum of its proper divisors (13614232).

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

12815528 is a wasteful number, since it uses less digits than its factorization.

12815528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 1213 counting only the distinct ones).

The product of its digits is 6400, while the sum is 32.

The square root of 12815528 is about 3579.8782102189. The cubic root of 12815528 is about 234.0159728060.

The spelling of 12815528 in words is "twelve million, eight hundred fifteen thousand, five hundred twenty-eight".