228308189 has 4 divisors (see below), whose sum is σ = 238234656. Its totient is φ = 218381724.

The previous prime is 228308159. The next prime is 228308203. The reversal of 228308189 is 981803822.

It is a happy number.

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 228308189 - 2¹² = 228304093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228308159) 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, 4963199 + ... + 4963244.

It is an arithmetic number, because the mean of its divisors is an integer number (59558664).

Almost surely, 2^228308189 is an apocalyptic number.

It is an amenable number.

228308189 is a deficient number, since it is larger than the sum of its proper divisors (9926467).

228308189 is an equidigital number, since it uses as much as digits as its factorization.

228308189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9926466.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 228308189 is about 15109.8705818415. The cubic root of 228308189 is about 611.1866080966.

The spelling of 228308189 in words is "two hundred twenty-eight million, three hundred eight thousand, one hundred eighty-nine".