187868 has 12 divisors (see below), whose sum is σ = 334152. Its totient is φ = 92400.

The previous prime is 187861. The next prime is 187871. The reversal of 187868 is 868781.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187861) by changing a digit.

187868 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 3 ways as a sum of consecutive naturals, for example, 83 + ... + 618.

It is an arithmetic number, because the mean of its divisors is an integer number (27846).

2¹⁸⁷⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

187868 is a deficient number, since it is larger than the sum of its proper divisors (146284).

187868 is a wasteful number, since it uses less digits than its factorization.

187868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772 (or 770 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 187868 is about 433.4374233958. The cubic root of 187868 is about 57.2731325319.

The spelling of 187868 in words is "one hundred eighty-seven thousand, eight hundred sixty-eight".