228919 has 8 divisors (see below), whose sum is σ = 246240. Its totient is φ = 212256.

The previous prime is 228913. The next prime is 228923. The reversal of 228919 is 919822.

228919 is nontrivially palindromic in base 14.

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

It is a cyclic number.

It is not a de Polignac number, because 228919 - 2³ = 228911 is a prime.

It is a super-2 number, since 2×228919² = 104807817122, which contains 22 as substring.

It is a Duffinian number.

228919 is an undulating number in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 717 + ... + 985.

It is an arithmetic number, because the mean of its divisors is an integer number (30780).

2²²⁸⁹¹⁹ is an apocalyptic number.

228919 is a deficient number, since it is larger than the sum of its proper divisors (17321).

228919 is a wasteful number, since it uses less digits than its factorization.

228919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329.

The product of its digits is 2592, while the sum is 31.

The square root of 228919 is about 478.4548045532. The cubic root of 228919 is about 61.1731174742.

The spelling of 228919 in words is "two hundred twenty-eight thousand, nine hundred nineteen".