1820318 has 16 divisors (see below), whose sum is σ = 2842560. Its totient is φ = 873600.

The previous prime is 1820311. The next prime is 1820339. The reversal of 1820318 is 8130281.

It is a super-2 number, since 2×1820318² = 6627115242248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1820293 and 1820302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6338 + ... + 6618.

It is an arithmetic number, because the mean of its divisors is an integer number (177660).

2^1820318 is an apocalyptic number.

1820318 is a deficient number, since it is larger than the sum of its proper divisors (1022242).

1820318 is a wasteful number, since it uses less digits than its factorization.

1820318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1820318 is about 1349.1916098168. The cubic root of 1820318 is about 122.1000254666.

Adding to 1820318 its reverse (8130281), we get a palindrome (9950599).

The spelling of 1820318 in words is "one million, eight hundred twenty thousand, three hundred eighteen".