28303284 has 24 divisors (see below), whose sum is σ = 67652928. Its totient is φ = 9204160.

The previous prime is 28303273. The next prime is 28303291. The reversal of 28303284 is 48230382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28272 + ... + 29255.

It is an arithmetic number, because the mean of its divisors is an integer number (2818872).

Almost surely, 2^28303284 is an apocalyptic number.

It is an amenable number.

28303284 is an abundant number, since it is smaller than the sum of its proper divisors (39349644).

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

28303284 is a wasteful number, since it uses less digits than its factorization.

28303284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57575 (or 57573 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 28303284 is about 5320.0830820580. The cubic root of 28303284 is about 304.7513300538.

The spelling of 28303284 in words is "twenty-eight million, three hundred three thousand, two hundred eighty-four".