228724 has 12 divisors (see below), whose sum is σ = 403648. Its totient is φ = 113400.

The previous prime is 228713. The next prime is 228731. The reversal of 228724 is 427822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709 + ... + 979.

2²²⁸⁷²⁴ is an apocalyptic number.

It is an amenable number.

228724 is a deficient number, since it is larger than the sum of its proper divisors (174924).

228724 is a wasteful number, since it uses less digits than its factorization.

228724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 484 counting only the distinct ones).

The product of its digits is 1792, while the sum is 25.

The square root of 228724 is about 478.2509801349. The cubic root of 228724 is about 61.1557428473.

The spelling of 228724 in words is "two hundred twenty-eight thousand, seven hundred twenty-four".