181828 has 12 divisors (see below), whose sum is σ = 321552. Its totient is φ = 89960.

The previous prime is 181813. The next prime is 181837. The reversal of 181828 is 828181.

It is a super-2 number, since 2×181828² = 66122843168, which contains 22 as substring.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 181796 and 181805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351 + ... + 697.

It is an arithmetic number, because the mean of its divisors is an integer number (26796).

2¹⁸¹⁸²⁸ is an apocalyptic number.

It is an amenable number.

181828 is a deficient number, since it is larger than the sum of its proper divisors (139724).

181828 is a wasteful number, since it uses less digits than its factorization.

181828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 480 counting only the distinct ones).

The product of its digits is 1024, while the sum is 28.

The square root of 181828 is about 426.4129453945. The cubic root of 181828 is about 56.6526532053.

The spelling of 181828 in words is "one hundred eighty-one thousand, eight hundred twenty-eight".