12928284 has 72 divisors (see below), whose sum is σ = 35315280. Its totient is φ = 3974400.

The previous prime is 12928273. The next prime is 12928297. The reversal of 12928284 is 48282921.

12928284 = 11² + 12² + ... + 338².

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 27814 + ... + 28274.

It is an arithmetic number, because the mean of its divisors is an integer number (490490).

Almost surely, 2^12928284 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 12928284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17657640).

12928284 is an abundant number, since it is smaller than the sum of its proper divisors (22386996).

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

12928284 is a wasteful number, since it uses less digits than its factorization.

12928284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 526 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 12928284 is about 3595.5923016938. The cubic root of 12928284 is about 234.7002909306.

The spelling of 12928284 in words is "twelve million, nine hundred twenty-eight thousand, two hundred eighty-four".