12520728 has 48 divisors (see below), whose sum is σ = 36995400. Its totient is φ = 3793920.

The previous prime is 12520723. The next prime is 12520747. The reversal of 12520728 is 82702521.

12520728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7113 + ... + 8696.

Almost surely, 2^12520728 is an apocalyptic number.

12520728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12520728 is an abundant number, since it is smaller than the sum of its proper divisors (24474672).

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

12520728 is a wasteful number, since it uses less digits than its factorization.

12520728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15832 (or 15825 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 12520728 is about 3538.4640735777. The cubic root of 12520728 is about 232.2076519767.

The spelling of 12520728 in words is "twelve million, five hundred twenty thousand, seven hundred twenty-eight".