228687 has 8 divisors (see below), whose sum is σ = 314880. Its totient is φ = 147480.

The previous prime is 228677. The next prime is 228707. The reversal of 228687 is 786822.

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

It is not a de Polignac number, because 228687 - 2⁷ = 228559 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 228687.

It is not an unprimeable number, because it can be changed into a prime (228617) 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, 1137 + ... + 1322.

It is an arithmetic number, because the mean of its divisors is an integer number (39360).

2²²⁸⁶⁸⁷ is an apocalyptic number.

228687 is a deficient number, since it is larger than the sum of its proper divisors (86193).

228687 is a wasteful number, since it uses less digits than its factorization.

228687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493.

The product of its digits is 10752, while the sum is 33.

The square root of 228687 is about 478.2122959523. The cubic root of 228687 is about 61.1524450087.

The spelling of 228687 in words is "two hundred twenty-eight thousand, six hundred eighty-seven".