223428 has 24 divisors (see below), whose sum is σ = 534688. Its totient is φ = 72576.

The previous prime is 223423. The next prime is 223429. The reversal of 223428 is 824322.

It is a nialpdrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (223423) by changing a digit.

223428 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, 300 + ... + 732.

2²²³⁴²⁸ is an apocalyptic number.

It is an amenable number.

223428 is an abundant number, since it is smaller than the sum of its proper divisors (311260).

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

223428 is a wasteful number, since it uses less digits than its factorization.

223428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 481 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 223428 is about 472.6817110911. The cubic root of 223428 is about 60.6800410610.

The spelling of 223428 in words is "two hundred twenty-three thousand, four hundred twenty-eight".