228560 has 20 divisors (see below), whose sum is σ = 531588. Its totient is φ = 91392.

The previous prime is 228559. The next prime is 228577. The reversal of 228560 is 65822.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 118336 + 110224 = 344^2 + 332^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1349 + ... + 1508.

2²²⁸⁵⁶⁰ is an apocalyptic number.

228560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228560 is an abundant number, since it is smaller than the sum of its proper divisors (303028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228560 is a wasteful number, since it uses less digits than its factorization.

228560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870 (or 2864 counting only the distinct ones).

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

The square root of 228560 is about 478.0794912983. The cubic root of 228560 is about 61.1411226939.

The spelling of 228560 in words is "two hundred twenty-eight thousand, five hundred sixty".