1812168 has 24 divisors (see below), whose sum is σ = 4908150. Its totient is φ = 604032.

The previous prime is 1812157. The next prime is 1812199. The reversal of 1812168 is 8612181.

It can be written as a sum of positive squares in only one way, i.e., 1695204 + 116964 = 1302^2 + 342^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable 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 in 5 ways as a sum of consecutive naturals, for example, 12513 + ... + 12656.

2^1812168 is an apocalyptic number.

1812168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1812168 is an abundant number, since it is smaller than the sum of its proper divisors (3095982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1812168 is a wasteful number, since it uses less digits than its factorization.

1812168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25181 (or 25174 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 1812168 is about 1346.1678944322. The cubic root of 1812168 is about 121.9175291417.

It can be divided in two parts, 18 and 12168, that multiplied together give a square (219024 = 468²).

The spelling of 1812168 in words is "one million, eight hundred twelve thousand, one hundred sixty-eight".