1881800 has 36 divisors (see below), whose sum is σ = 4420755. Its totient is φ = 744960.

The previous prime is 1881799. The next prime is 1881811. The reversal of 1881800 is 81881.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 586756 + 1295044 = 766^2 + 1138^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=970.

It is a self number, because there is not a number n which added to its sum of digits gives 1881800.

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 8 ways as a sum of consecutive naturals, for example, 19352 + ... + 19448.

2^1881800 is an apocalyptic number.

1881800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1881800

1881800 is an abundant number, since it is smaller than the sum of its proper divisors (2538955).

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

1881800 is an equidigital number, since it uses as much as digits as its factorization.

1881800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 26.

The square root of 1881800 is about 1371.7871555019. The cubic root of 1881800 is about 123.4594926898.

Multiplying 1881800 by its product of nonzero digits (512), we get a square (963481600 = 31040²).

It can be divided in two parts, 18 and 81800, that added together give a palindrome (81818).

The spelling of 1881800 in words is "one million, eight hundred eighty-one thousand, eight hundred".