87228 has 18 divisors (see below), whose sum is σ = 220584. Its totient is φ = 29064.

The previous prime is 87223. The next prime is 87251. The reversal of 87228 is 82278.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87221) by changing a digit.

87228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1176 + ... + 1247.

2⁸⁷²²⁸ is an apocalyptic number.

It is an amenable number.

87228 is an abundant number, since it is smaller than the sum of its proper divisors (133356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87228 is a wasteful number, since it uses less digits than its factorization.

87228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433 (or 2428 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 87228 is about 295.3438673817. The cubic root of 87228 is about 44.3491504544.

Subtracting from 87228 its reverse (82278), we obtain a triangular number (4950 = T₉₉).

It can be divided in two parts, 872 and 28, that added together give a square (900 = 30²).

The spelling of 87228 in words is "eighty-seven thousand, two hundred twenty-eight".