228780 has 72 divisors (see below), whose sum is σ = 733824. Its totient is φ = 57600.

The previous prime is 228773. The next prime is 228793. The reversal of 228780 is 87822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5560 + ... + 5600.

It is an arithmetic number, because the mean of its divisors is an integer number (10192).

2²²⁸⁷⁸⁰ is an apocalyptic number.

228780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366912).

228780 is an abundant number, since it is smaller than the sum of its proper divisors (505044).

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

228780 is a wasteful number, since it uses less digits than its factorization.

228780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 228780 is about 478.3095232169. The cubic root of 228780 is about 61.1607334942.

It can be divided in two parts, 2 and 28780, that added together give a palindrome (28782).

The spelling of 228780 in words is "two hundred twenty-eight thousand, seven hundred eighty".