1820328 has 32 divisors (see below), whose sum is σ = 4617600. Its totient is φ = 597888.

The previous prime is 1820311. The next prime is 1820339. The reversal of 1820328 is 8230281.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1820298 and 1820307.

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 7 ways as a sum of consecutive naturals, for example, 1233 + ... + 2271.

It is an arithmetic number, because the mean of its divisors is an integer number (144300).

2^1820328 is an apocalyptic number.

It is an amenable number.

1820328 is an abundant number, since it is smaller than the sum of its proper divisors (2797272).

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

1820328 is a wasteful number, since it uses less digits than its factorization.

1820328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1820328 is about 1349.1953157345. The cubic root of 1820328 is about 122.1002490535.

The spelling of 1820328 in words is "one million, eight hundred twenty thousand, three hundred twenty-eight".