228487 has 6 divisors (see below), whose sum is σ = 265848. Its totient is φ = 195804.

The previous prime is 228479. The next prime is 228509. The reversal of 228487 is 784822.

It is not a de Polignac number, because 228487 - 2³ = 228479 is a prime.

It is a Duffinian number.

228487 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228427) 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 5 ways as a sum of consecutive naturals, for example, 2283 + ... + 2380.

It is an arithmetic number, because the mean of its divisors is an integer number (44308).

2²²⁸⁴⁸⁷ is an apocalyptic number.

228487 is a deficient number, since it is larger than the sum of its proper divisors (37361).

228487 is an equidigital number, since it uses as much as digits as its factorization.

228487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677 (or 4670 counting only the distinct ones).

The product of its digits is 7168, while the sum is 31.

The square root of 228487 is about 478.0031380650. The cubic root of 228487 is about 61.1346126933.

The spelling of 228487 in words is "two hundred twenty-eight thousand, four hundred eighty-seven".