187828 has 6 divisors (see below), whose sum is σ = 328706. Its totient is φ = 93912.

The previous prime is 187823. The next prime is 187843. The reversal of 187828 is 828781.

187828 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 142884 + 44944 = 378^2 + 212^2 .

It is a junction number, because it is equal to n+sod(n) for n = 187793 and 187802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187823) by changing a digit.

187828 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, 23475 + ... + 23482.

2¹⁸⁷⁸²⁸ is an apocalyptic number.

It is an amenable number.

187828 is a deficient number, since it is larger than the sum of its proper divisors (140878).

187828 is a wasteful number, since it uses less digits than its factorization.

187828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46961 (or 46959 counting only the distinct ones).

The product of its digits is 7168, while the sum is 34.

The square root of 187828 is about 433.3912781771. The cubic root of 187828 is about 57.2690674650.

The spelling of 187828 in words is "one hundred eighty-seven thousand, eight hundred twenty-eight".