1822812 has 12 divisors (see below), whose sum is σ = 4253256. Its totient is φ = 607600.

The previous prime is 1822811. The next prime is 1822823. The reversal of 1822812 is 2182281.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822811) 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, 75939 + ... + 75962.

It is an arithmetic number, because the mean of its divisors is an integer number (354438).

2^1822812 is an apocalyptic number.

1822812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1822812 is an abundant number, since it is smaller than the sum of its proper divisors (2430444).

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

1822812 is a wasteful number, since it uses less digits than its factorization.

1822812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151908 (or 151906 counting only the distinct ones).

The product of its digits is 512, while the sum is 24.

The square root of 1822812 is about 1350.1155506104. The cubic root of 1822812 is about 122.1557627054.

The spelling of 1822812 in words is "one million, eight hundred twenty-two thousand, eight hundred twelve".