28304112 has 40 divisors (see below), whose sum is σ = 75099856. Its totient is φ = 9179136.

The previous prime is 28304077. The next prime is 28304113. The reversal of 28304112 is 21140382.

It is a super-2 number, since 2×28304112² = 1602245512217088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28304113) 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, 6193 + ... + 9744.

Almost surely, 2^28304112 is an apocalyptic number.

It is an amenable number.

28304112 is an abundant number, since it is smaller than the sum of its proper divisors (46795744).

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

28304112 is a wasteful number, since it uses less digits than its factorization.

28304112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15985 (or 15979 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 28304112 is about 5320.1608998225. The cubic root of 28304112 is about 304.7543018131.

Adding to 28304112 its reverse (21140382), we get a palindrome (49444494).

The spelling of 28304112 in words is "twenty-eight million, three hundred four thousand, one hundred twelve".