228320236 has 6 divisors (see below), whose sum is σ = 399560420. Its totient is φ = 114160116.

The previous prime is 228320221. The next prime is 228320317. The reversal of 228320236 is 632023822.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28540026 + ... + 28540033.

Almost surely, 2^228320236 is an apocalyptic number.

It is an amenable number.

228320236 is a deficient number, since it is larger than the sum of its proper divisors (171240184).

228320236 is a wasteful number, since it uses less digits than its factorization.

228320236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57080063 (or 57080061 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 228320236 is about 15110.2692232799. The cubic root of 228320236 is about 611.1973579455.

The spelling of 228320236 in words is "two hundred twenty-eight million, three hundred twenty thousand, two hundred thirty-six".