228642 has 16 divisors (see below), whose sum is σ = 466560. Its totient is φ = 74672.

The previous prime is 228637. The next prime is 228647. The reversal of 228642 is 246822.

It is an interprime number because it is at equal distance from previous prime (228637) and next prime (228647).

It is not an unprimeable number, because it can be changed into a prime (228647) by changing a digit.

228642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42 + ... + 677.

It is an arithmetic number, because the mean of its divisors is an integer number (29160).

2²²⁸⁶⁴² is an apocalyptic number.

228642 is an abundant number, since it is smaller than the sum of its proper divisors (237918).

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

228642 is a wasteful number, since it uses less digits than its factorization.

228642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777.

The product of its digits is 1536, while the sum is 24.

The square root of 228642 is about 478.1652434044. The cubic root of 228642 is about 61.1484336445.

The spelling of 228642 in words is "two hundred twenty-eight thousand, six hundred forty-two".