187228 has 6 divisors (see below), whose sum is σ = 327656. Its totient is φ = 93612.

The previous prime is 187223. The next prime is 187237. The reversal of 187228 is 822781.

It is a junction number, because it is equal to n+sod(n) for n = 187196 and 187205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187223) by changing a digit.

187228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 23400 + ... + 23407.

2¹⁸⁷²²⁸ is an apocalyptic number.

It is an amenable number.

187228 is a deficient number, since it is larger than the sum of its proper divisors (140428).

187228 is a wasteful number, since it uses less digits than its factorization.

187228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46811 (or 46809 counting only the distinct ones).

The product of its digits is 1792, while the sum is 28.

The square root of 187228 is about 432.6985093573. The cubic root of 187228 is about 57.2080220871.

The spelling of 187228 in words is "one hundred eighty-seven thousand, two hundred twenty-eight".