28583868 has 48 divisors (see below), whose sum is σ = 71807904. Its totient is φ = 8816640.

The previous prime is 28583861. The next prime is 28583881. The reversal of 28583868 is 86838582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28583861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11296 + ... + 13592.

It is an arithmetic number, because the mean of its divisors is an integer number (1495998).

Almost surely, 2^28583868 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 28583868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35903952).

28583868 is an abundant number, since it is smaller than the sum of its proper divisors (43224036).

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

28583868 is a wasteful number, since it uses less digits than its factorization.

28583868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382 (or 2380 counting only the distinct ones).

The product of its digits is 737280, while the sum is 48.

The square root of 28583868 is about 5346.3883136188. The cubic root of 28583868 is about 305.7550690718.

The spelling of 28583868 in words is "twenty-eight million, five hundred eighty-three thousand, eight hundred sixty-eight".