28315284 has 24 divisors (see below), whose sum is σ = 66867360. Its totient is φ = 9324384.

The previous prime is 28315247. The next prime is 28315289. The reversal of 28315284 is 48251382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28315289) 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, 13219 + ... + 15210.

It is an arithmetic number, because the mean of its divisors is an integer number (2786140).

Almost surely, 2^28315284 is an apocalyptic number.

It is an amenable number.

28315284 is an abundant number, since it is smaller than the sum of its proper divisors (38552076).

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

28315284 is a wasteful number, since it uses less digits than its factorization.

28315284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28519 (or 28517 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 28315284 is about 5321.2107644783. The cubic root of 28315284 is about 304.7943933634.

The spelling of 28315284 in words is "twenty-eight million, three hundred fifteen thousand, two hundred eighty-four".