228403 has 8 divisors (see below), whose sum is σ = 265472. Its totient is φ = 192456.

The previous prime is 228383. The next prime is 228409. The reversal of 228403 is 304822.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228403 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (228409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226 + ... + 712.

It is an arithmetic number, because the mean of its divisors is an integer number (33184).

2²²⁸⁴⁰³ is an apocalyptic number.

228403 is a deficient number, since it is larger than the sum of its proper divisors (37069).

228403 is an equidigital number, since it uses as much as digits as its factorization.

228403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 228403 is about 477.9152644559. The cubic root of 228403 is about 61.1271200177.

The spelling of 228403 in words is "two hundred twenty-eight thousand, four hundred three".