228504 has 16 divisors (see below), whose sum is σ = 571320. Its totient is φ = 76160.

The previous prime is 228479. The next prime is 228509. The reversal of 228504 is 405822.

228504 = T₂₃₅ + T₂₃₆ + ... + T₂₄₂.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228509) by changing a digit.

228504 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 3 ways as a sum of consecutive naturals, for example, 4737 + ... + 4784.

2²²⁸⁵⁰⁴ is an apocalyptic number.

228504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

228504 is an abundant number, since it is smaller than the sum of its proper divisors (342816).

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

228504 is a wasteful number, since it uses less digits than its factorization.

228504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9530 (or 9526 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 228504 is about 478.0209200443. The cubic root of 228504 is about 61.1361288447.

The spelling of 228504 in words is "two hundred twenty-eight thousand, five hundred four".