28068228 has 48 divisors (see below), whose sum is σ = 73100160. Its totient is φ = 9313632.

The previous prime is 28068199. The next prime is 28068253. The reversal of 28068228 is 82286082.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28068192 and 28068201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31201 + ... + 32087.

It is an arithmetic number, because the mean of its divisors is an integer number (1522920).

Almost surely, 2^28068228 is an apocalyptic number.

It is an amenable number.

28068228 is an abundant number, since it is smaller than the sum of its proper divisors (45031932).

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

28068228 is a wasteful number, since it uses less digits than its factorization.

28068228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193 (or 1185 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 28068228 is about 5297.9456395852. The cubic root of 28068228 is about 303.9053404495.

The spelling of 28068228 in words is "twenty-eight million, sixty-eight thousand, two hundred twenty-eight".