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7228 = 2213139
BaseRepresentation
bin1110000111100
3100220201
41300330
5212403
653244
730034
oct16074
910821
107228
115481
124224
1333a0
1428c4
15221d
hex1c3c

7228 has 12 divisors (see below), whose sum is σ = 13720. Its totient is φ = 3312.

The previous prime is 7219. The next prime is 7229. The reversal of 7228 is 8227.

7228 is nontrivially palindromic in base 12.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18 + ... + 121.

27228 is an apocalyptic number.

It is an amenable number.

7228 is a deficient number, since it is larger than the sum of its proper divisors (6492).

7228 is a wasteful number, since it uses less digits than its factorization.

7228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 154 counting only the distinct ones).

The product of its digits is 224, while the sum is 19.

The square root of 7228 is about 85.0176452273. The cubic root of 7228 is about 19.3347865204.

Subtracting 7228 from its reverse (8227), we obtain a palindrome (999).

It can be divided in two parts, 722 and 8, that multiplied together give a square (5776 = 762).

The spelling of 7228 in words is "seven thousand, two hundred twenty-eight".

Divisors: 1 2 4 13 26 52 139 278 556 1807 3614 7228