228091 has 8 divisors (see below), whose sum is σ = 244224. Its totient is φ = 212520.

The previous prime is 228077. The next prime is 228097. The reversal of 228091 is 190822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-228091 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 (228097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 976 + ... + 1186.

It is an arithmetic number, because the mean of its divisors is an integer number (30528).

2²²⁸⁰⁹¹ is an apocalyptic number.

228091 is a deficient number, since it is larger than the sum of its proper divisors (16133).

228091 is a wasteful number, since it uses less digits than its factorization.

228091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 228091 is about 477.5887352105. The cubic root of 228091 is about 61.0992739852.

The spelling of 228091 in words is "two hundred twenty-eight thousand, ninety-one".