1820799 has 24 divisors (see below), whose sum is σ = 2795520. Its totient is φ = 1183896.

The previous prime is 1820783. The next prime is 1820809. The reversal of 1820799 is 9970281.

It is a happy number.

It is not a de Polignac number, because 1820799 - 2⁴ = 1820783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820759) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14274 + ... + 14400.

It is an arithmetic number, because the mean of its divisors is an integer number (116480).

2^1820799 is an apocalyptic number.

1820799 is a deficient number, since it is larger than the sum of its proper divisors (974721).

1820799 is an equidigital number, since it uses as much as digits as its factorization.

1820799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1820799 is about 1349.3698529314. The cubic root of 1820799 is about 122.1107790712.

The spelling of 1820799 in words is "one million, eight hundred twenty thousand, seven hundred ninety-nine".