228987 has 20 divisors (see below), whose sum is σ = 374616. Its totient is φ = 138240.

The previous prime is 228983. The next prime is 228989. The reversal of 228987 is 789822.

It is not a de Polignac number, because 228987 - 2² = 228983 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 228987.

It is not an unprimeable number, because it can be changed into a prime (228983) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 763 + ... + 1019.

2²²⁸⁹⁸⁷ is an apocalyptic number.

228987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

228987 is a deficient number, since it is larger than the sum of its proper divisors (145629).

228987 is a wasteful number, since it uses less digits than its factorization.

228987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 271 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 228987 is about 478.5258613701. The cubic root of 228987 is about 61.1791739980.

It can be divided in two parts, 22 and 8987, that added together give a palindrome (9009).

The spelling of 228987 in words is "two hundred twenty-eight thousand, nine hundred eighty-seven".