228732089 has 4 divisors (see below), whose sum is σ = 240770640. Its totient is φ = 216693540.

The previous prime is 228732083. The next prime is 228732121. The reversal of 228732089 is 980237822.

228732089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 228732089 - 2⁴ = 228732073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228732083) 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, 6019247 + ... + 6019284.

It is an arithmetic number, because the mean of its divisors is an integer number (60192660).

Almost surely, 2^228732089 is an apocalyptic number.

It is an amenable number.

228732089 is a deficient number, since it is larger than the sum of its proper divisors (12038551).

228732089 is a wasteful number, since it uses less digits than its factorization.

228732089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12038550.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 228732089 is about 15123.8913312679. The cubic root of 228732089 is about 611.5646377876.

The spelling of 228732089 in words is "two hundred twenty-eight million, seven hundred thirty-two thousand, eighty-nine".