228620 has 48 divisors (see below), whose sum is σ = 580608. Its totient is φ = 73920.

The previous prime is 228619. The next prime is 228637. The reversal of 228620 is 26822.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 228592 and 228601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3185 + ... + 3255.

It is an arithmetic number, because the mean of its divisors is an integer number (12096).

2²²⁸⁶²⁰ is an apocalyptic number.

228620 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 228620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290304).

228620 is an abundant number, since it is smaller than the sum of its proper divisors (351988).

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

228620 is a wasteful number, since it uses less digits than its factorization.

228620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 228620 is about 478.1422382513. The cubic root of 228620 is about 61.1464723415.

It can be divided in two parts, 228 and 620, that added together give a palindrome (848).

The spelling of 228620 in words is "two hundred twenty-eight thousand, six hundred twenty".