28287876 has 36 divisors (see below), whose sum is σ = 68383952. Its totient is φ = 9100896.

The previous prime is 28287863. The next prime is 28287877. The reversal of 28287876 is 67878282.

It is not an unprimeable number, because it can be changed into a prime (28287877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8691 + ... + 11493.

Almost surely, 2^28287876 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 28287876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34191976).

28287876 is an abundant number, since it is smaller than the sum of its proper divisors (40096076).

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

28287876 is a wasteful number, since it uses less digits than its factorization.

28287876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868 (or 2837 counting only the distinct ones).

The product of its digits is 602112, while the sum is 48.

The square root of 28287876 is about 5318.6347872363. The cubic root of 28287876 is about 304.6960189124.

The spelling of 28287876 in words is "twenty-eight million, two hundred eighty-seven thousand, eight hundred seventy-six".