28245256 has 32 divisors (see below), whose sum is σ = 57619800. Its totient is φ = 12902400.

The previous prime is 28245253. The next prime is 28245263. The reversal of 28245256 is 65254282.

It can be written as a sum of positive squares in 4 ways, for example, as 19448100 + 8797156 = 4410^2 + 2966^2 .

It is not an unprimeable number, because it can be changed into a prime (28245251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9160 + ... + 11848.

Almost surely, 2^28245256 is an apocalyptic number.

28245256 is a gapful number since it is divisible by the number (26) 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 28245256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28809900).

28245256 is an abundant number, since it is smaller than the sum of its proper divisors (29374544).

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

28245256 is a wasteful number, since it uses less digits than its factorization.

28245256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809 (or 2805 counting only the distinct ones).

The product of its digits is 38400, while the sum is 34.

The square root of 28245256 is about 5314.6266096500. The cubic root of 28245256 is about 304.5429183207.

The spelling of 28245256 in words is "twenty-eight million, two hundred forty-five thousand, two hundred fifty-six".