12528990 has 48 divisors (see below), whose sum is σ = 33038928. Its totient is φ = 3293568.

The previous prime is 12528979. The next prime is 12529009. The reversal of 12528990 is 9982521.

It is a congruent number.

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, 5617 + ... + 7523.

It is an arithmetic number, because the mean of its divisors is an integer number (688311).

Almost surely, 2^12528990 is an apocalyptic number.

12528990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12528990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16519464).

12528990 is an abundant number, since it is smaller than the sum of its proper divisors (20509938).

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

12528990 is a wasteful number, since it uses less digits than its factorization.

12528990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1990 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 12528990 is about 3539.6313367355. The cubic root of 12528990 is about 232.2587160413.

The spelling of 12528990 in words is "twelve million, five hundred twenty-eight thousand, nine hundred ninety".