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2228 = 22557
BaseRepresentation
bin100010110100
310001112
4202310
532403
614152
76332
oct4264
93045
102228
111746
121358
131025
14b52
159d8
hex8b4

2228 has 6 divisors (see below), whose sum is σ = 3906. Its totient is φ = 1112.

The previous prime is 2221. The next prime is 2237. The reversal of 2228 is 8222.

It can be divided in two parts, 22 and 28, that multiplied together give a palindrome (616).

It can be written as a sum of positive squares in only one way, i.e., 1444 + 784 = 38^2 + 28^2 .

It is a plaindrome in base 10 and base 12.

It is a nialpdrome in base 7 and base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221) by changing a digit.

2228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275 + ... + 282.

It is an arithmetic number, because the mean of its divisors is an integer number (651).

It is an amenable number.

2228 is a deficient number, since it is larger than the sum of its proper divisors (1678).

2228 is a wasteful number, since it uses less digits than its factorization.

2228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 559 counting only the distinct ones).

The product of its digits is 64, while the sum is 14.

The square root of 2228 is about 47.2016948848. The cubic root of 2228 is about 13.0608586340.

The spelling of 2228 in words is "two thousand, two hundred twenty-eight".

Divisors: 1 2 4 557 1114 2228