1813800 has 48 divisors (see below), whose sum is σ = 5624640. Its totient is φ = 483520.

The previous prime is 1813793. The next prime is 1813813. The reversal of 1813800 is 83181.

It is a happy 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 11 ways as a sum of consecutive naturals, for example, 912 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (117180).

2^1813800 is an apocalyptic number.

1813800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1813800 is an abundant number, since it is smaller than the sum of its proper divisors (3810840).

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

1813800 is a wasteful number, since it uses less digits than its factorization.

1813800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042 (or 3033 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 1813800 is about 1346.7739231215. The cubic root of 1813800 is about 121.9541169393.

Adding to 1813800 its reverse (83181), we get a palindrome (1896981).

The spelling of 1813800 in words is "one million, eight hundred thirteen thousand, eight hundred".