228997 has 8 divisors (see below), whose sum is σ = 241920. Its totient is φ = 216480.

The previous prime is 228989. The next prime is 229003. The reversal of 228997 is 799822.

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 228997 - 2³ = 228989 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2529 + ... + 2617.

It is an arithmetic number, because the mean of its divisors is an integer number (30240).

2²²⁸⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

228997 is a deficient number, since it is larger than the sum of its proper divisors (12923).

228997 is an equidigital number, since it uses as much as digits as its factorization.

228997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203.

The product of its digits is 18144, while the sum is 37.

The square root of 228997 is about 478.5363100121. The cubic root of 228997 is about 61.1800645622.

It can be divided in two parts, 228 and 997, that added together give a triangular number (1225 = T₄₉).

The spelling of 228997 in words is "two hundred twenty-eight thousand, nine hundred ninety-seven".