228612089 has 4 divisors (see below), whose sum is σ = 233476224. Its totient is φ = 223747956.

The previous prime is 228612031. The next prime is 228612127. The reversal of 228612089 is 980216822.

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 228612089 - 2⁸ = 228611833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228612029) 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, 2431997 + ... + 2432090.

It is an arithmetic number, because the mean of its divisors is an integer number (58369056).

Almost surely, 2^228612089 is an apocalyptic number.

It is an amenable number.

228612089 is a deficient number, since it is larger than the sum of its proper divisors (4864135).

228612089 is an equidigital number, since it uses as much as digits as its factorization.

228612089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4864134.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 228612089 is about 15119.9235778492. The cubic root of 228612089 is about 611.4576704408.

The spelling of 228612089 in words is "two hundred twenty-eight million, six hundred twelve thousand, eighty-nine".