228730 has 16 divisors (see below), whose sum is σ = 417960. Its totient is φ = 90112.

The previous prime is 228713. The next prime is 228731. The reversal of 228730 is 37822.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 208849 + 19881 = 457^2 + 141^2 .

It is not an unprimeable number, because it can be changed into a prime (228731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762 + ... + 1018.

2²²⁸⁷³⁰ is an apocalyptic number.

228730 is a deficient number, since it is larger than the sum of its proper divisors (189230).

228730 is a wasteful number, since it uses less digits than its factorization.

228730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 228730 is about 478.2572529508. The cubic root of 228730 is about 61.1562775984.

The spelling of 228730 in words is "two hundred twenty-eight thousand, seven hundred thirty".