28009282 has 24 divisors (see below), whose sum is σ = 49083840. Its totient is φ = 11952360.

The previous prime is 28009231. The next prime is 28009291. The reversal of 28009282 is 28290082.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30019 + ... + 30937.

It is an arithmetic number, because the mean of its divisors is an integer number (2045160).

Almost surely, 2^28009282 is an apocalyptic number.

28009282 is a deficient number, since it is larger than the sum of its proper divisors (21074558).

28009282 is a wasteful number, since it uses less digits than its factorization.

28009282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 28009282 is about 5292.3796160140. The cubic root of 28009282 is about 303.6924477886.

The spelling of 28009282 in words is "twenty-eight million, nine thousand, two hundred eighty-two".