1822784 has 28 divisors (see below), whose sum is σ = 3810000. Its totient is φ = 862848.

The previous prime is 1822781. The next prime is 1822787. The reversal of 1822784 is 4872281.

It is an interprime number because it is at equal distance from previous prime (1822781) and next prime (1822787).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1822784.

It is not an unprimeable number, because it can be changed into a prime (1822781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467 + ... + 1965.

2^1822784 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 1822784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1905000).

1822784 is an abundant number, since it is smaller than the sum of its proper divisors (1987216).

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

1822784 is a wasteful number, since it uses less digits than its factorization.

1822784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530 (or 1520 counting only the distinct ones).

The product of its digits is 7168, while the sum is 32.

The square root of 1822784 is about 1350.1051810878. The cubic root of 1822784 is about 122.1551372288.

The spelling of 1822784 in words is "one million, eight hundred twenty-two thousand, seven hundred eighty-four".