228793891 has 4 divisors (see below), whose sum is σ = 228897784. Its totient is φ = 228690000.

The previous prime is 228793843. The next prime is 228793909. The reversal of 228793891 is 198397822.

228793891 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.

It is a cyclic number.

It is not a de Polignac number, because 228793891 - 2⁹ = 228793379 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (228793391) 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, 48570 + ... + 53071.

It is an arithmetic number, because the mean of its divisors is an integer number (57224446).

Almost surely, 2^228793891 is an apocalyptic number.

228793891 is a deficient number, since it is larger than the sum of its proper divisors (103893).

228793891 is a wasteful number, since it uses less digits than its factorization.

228793891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103892.

The product of its digits is 435456, while the sum is 49.

The square root of 228793891 is about 15125.9343843612. The cubic root of 228793891 is about 611.6197131589.

The spelling of 228793891 in words is "two hundred twenty-eight million, seven hundred ninety-three thousand, eight hundred ninety-one".