1782022 has 8 divisors (see below), whose sum is σ = 2916072. Its totient is φ = 810000.

The previous prime is 1781981. The next prime is 1782043. The reversal of 1782022 is 2202871.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 81001 = 1782022 / (1 + 7 + 8 + 2 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 1781984 and 1782002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40479 + ... + 40522.

It is an arithmetic number, because the mean of its divisors is an integer number (364509).

2^1782022 is an apocalyptic number.

1782022 is a deficient number, since it is larger than the sum of its proper divisors (1134050).

1782022 is a wasteful number, since it uses less digits than its factorization.

1782022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81014.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1782022 is about 1334.9239678723. The cubic root of 1782022 is about 121.2376995351.

Adding to 1782022 its reverse (2202871), we get a palindrome (3984893).

The spelling of 1782022 in words is "one million, seven hundred eighty-two thousand, twenty-two".