187231228 has 6 divisors (see below), whose sum is σ = 327654656. Its totient is φ = 93615612.

The previous prime is 187231207. The next prime is 187231229. The reversal of 187231228 is 822132781.

It is a junction number, because it is equal to n+sod(n) for n = 187231193 and 187231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187231229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23403900 + ... + 23403907.

Almost surely, 2^187231228 is an apocalyptic number.

It is an amenable number.

187231228 is a deficient number, since it is larger than the sum of its proper divisors (140423428).

187231228 is a wasteful number, since it uses less digits than its factorization.

187231228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46807811 (or 46807809 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 187231228 is about 13683.2462522605. The cubic root of 187231228 is about 572.0835085992.

The spelling of 187231228 in words is "one hundred eighty-seven million, two hundred thirty-one thousand, two hundred twenty-eight".