28305112 has 32 divisors (see below), whose sum is σ = 58164480. Its totient is φ = 12806560.

The previous prime is 28305107. The next prime is 28305133. The reversal of 28305112 is 21150382.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 22533 + ... + 23755.

It is an arithmetic number, because the mean of its divisors is an integer number (1817640).

Almost surely, 2^28305112 is an apocalyptic number.

28305112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28305112 is an abundant number, since it is smaller than the sum of its proper divisors (29859368).

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

28305112 is a wasteful number, since it uses less digits than its factorization.

28305112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503 (or 1499 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 28305112 is about 5320.2548811124. The cubic root of 28305112 is about 304.7578908170.

Adding to 28305112 its reverse (21150382), we get a palindrome (49455494).

The spelling of 28305112 in words is "twenty-eight million, three hundred five thousand, one hundred twelve".