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22856 = 232857

22856 has 8 divisors (see below), whose sum is σ = 42870. Its totient is φ = 11424.

The previous prime is 22853. The next prime is 22859. The reversal of 22856 is 65822.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22853) and next prime (22859).

It can be written as a sum of positive squares in only one way, i.e., 17956 + 4900 = 134^2 + 70^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 12.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (22853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1421 + ... + 1436.

222856 is an apocalyptic number.

It is an amenable number.

22856 is a deficient number, since it is larger than the sum of its proper divisors (20014).

22856 is a wasteful number, since it uses less digits than its factorization.

22856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863 (or 2859 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 22856 is about 151.1820095117. The cubic root of 22856 is about 28.3791952371.

It can be divided in two parts, 22 and 856, that added together give a palindrome (878).

The spelling of 22856 in words is "twenty-two thousand, eight hundred fifty-six".

Divisors: 1 2 4 8 2857 5714 11428 22856