1798818 has 16 divisors (see below), whose sum is σ = 4111680. Its totient is φ = 513936.

The previous prime is 1798817. The next prime is 1798861. The reversal of 1798818 is 8188971.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 42829 = 1798818 / (1 + 7 + 9 + 8 + 8 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 1798818.

It is not an unprimeable number, because it can be changed into a prime (1798813) 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 7 ways as a sum of consecutive naturals, for example, 21373 + ... + 21456.

It is an arithmetic number, because the mean of its divisors is an integer number (256980).

2^1798818 is an apocalyptic number.

1798818 is an abundant number, since it is smaller than the sum of its proper divisors (2312862).

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

1798818 is a wasteful number, since it uses less digits than its factorization.

1798818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42841.

The product of its digits is 32256, while the sum is 42.

The square root of 1798818 is about 1341.2002087683. The cubic root of 1798818 is about 121.6174075524.

The spelling of 1798818 in words is "one million, seven hundred ninety-eight thousand, eight hundred eighteen".