228750189 has 4 divisors (see below), whose sum is σ = 305000256. Its totient is φ = 152500124.

The previous prime is 228750187. The next prime is 228750217. The reversal of 228750189 is 981057822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228750189 - 2¹ = 228750187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228750189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228750187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38125029 + ... + 38125034.

It is an arithmetic number, because the mean of its divisors is an integer number (76250064).

Almost surely, 2^228750189 is an apocalyptic number.

It is an amenable number.

228750189 is a deficient number, since it is larger than the sum of its proper divisors (76250067).

228750189 is an equidigital number, since it uses as much as digits as its factorization.

228750189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76250066.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 228750189 is about 15124.4897104001. The cubic root of 228750189 is about 611.5807687818.

The spelling of 228750189 in words is "two hundred twenty-eight million, seven hundred fifty thousand, one hundred eighty-nine".