228568 has 8 divisors (see below), whose sum is σ = 428580. Its totient is φ = 114280.

The previous prime is 228559. The next prime is 228577. The reversal of 228568 is 865822.

It is an interprime number because it is at equal distance from previous prime (228559) and next prime (228577).

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

It is an Ulam number.

It is a plaindrome in base 11 and base 15.

It is a congruent number.

It is an unprimeable number.

228568 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14278 + ... + 14293.

2²²⁸⁵⁶⁸ is an apocalyptic number.

It is an amenable number.

228568 is a deficient number, since it is larger than the sum of its proper divisors (200012).

228568 is a wasteful number, since it uses less digits than its factorization.

228568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28577 (or 28573 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 228568 is about 478.0878580345. The cubic root of 228568 is about 61.1418360343.

The spelling of 228568 in words is "two hundred twenty-eight thousand, five hundred sixty-eight".