1820484 has 36 divisors (see below), whose sum is σ = 4682860. Its totient is φ = 596160.

The previous prime is 1820471. The next prime is 1820501. The reversal of 1820484 is 4840281.

1820484 is a `hidden beast` number, since 182 + 0 + 484 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 451584 + 1368900 = 672^2 + 1170^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 1782 + ... + 2610.

2^1820484 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1820484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2341430).

1820484 is an abundant number, since it is smaller than the sum of its proper divisors (2862376).

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

1820484 is a wasteful number, since it uses less digits than its factorization.

1820484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 1820484 is about 1349.2531267335. The cubic root of 1820484 is about 122.1037369039.

It can be divided in two parts, 1820 and 484, that added together give a square (2304 = 48²).

The spelling of 1820484 in words is "one million, eight hundred twenty thousand, four hundred eighty-four".