187864 has 16 divisors (see below), whose sum is σ = 367920. Its totient is φ = 89760.

The previous prime is 187861. The next prime is 187871. The reversal of 187864 is 468781.

It is a happy number.

187864 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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

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 in 3 ways as a sum of consecutive naturals, for example, 327 + ... + 694.

It is an arithmetic number, because the mean of its divisors is an integer number (22995).

2¹⁸⁷⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

187864 is a deficient number, since it is larger than the sum of its proper divisors (180056).

187864 is a wasteful number, since it uses less digits than its factorization.

187864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050 (or 1046 counting only the distinct ones).

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

The square root of 187864 is about 433.4328090950. The cubic root of 187864 is about 57.2727260511.

The spelling of 187864 in words is "one hundred eighty-seven thousand, eight hundred sixty-four".