28728112 has 30 divisors (see below), whose sum is σ = 64749948. Its totient is φ = 12311712.

The previous prime is 28728097. The next prime is 28728121. The reversal of 28728112 is 21182782.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 17538 + ... + 19105.

Almost surely, 2^28728112 is an apocalyptic number.

It is an amenable number.

28728112 is an abundant number, since it is smaller than the sum of its proper divisors (36021836).

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

28728112 is a wasteful number, since it uses less digits than its factorization.

28728112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36665 (or 36652 counting only the distinct ones).

The product of its digits is 3584, while the sum is 31.

The square root of 28728112 is about 5359.8611922325. The cubic root of 28728112 is about 306.2685213288.

The spelling of 28728112 in words is "twenty-eight million, seven hundred twenty-eight thousand, one hundred twelve".