2809228 has 12 divisors (see below), whose sum is σ = 4943232. Its totient is φ = 1396880.

The previous prime is 2809223. The next prime is 2809241. The reversal of 2809228 is 8229082.

It is a self number, because there is not a number n which added to its sum of digits gives 2809228.

It is not an unprimeable number, because it can be changed into a prime (2809223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075 + ... + 2602.

It is an arithmetic number, because the mean of its divisors is an integer number (411936).

2^2809228 is an apocalyptic number.

It is an amenable number.

2809228 is a deficient number, since it is larger than the sum of its proper divisors (2134004).

2809228 is a wasteful number, since it uses less digits than its factorization.

2809228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3872 (or 3870 counting only the distinct ones).

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

The square root of 2809228 is about 1676.0751773116. The cubic root of 2809228 is about 141.1006440708.

The spelling of 2809228 in words is "two million, eight hundred nine thousand, two hundred twenty-eight".