1805922 has 32 divisors (see below), whose sum is σ = 4095360. Its totient is φ = 589680.

The previous prime is 1805911. The next prime is 1805941. The reversal of 1805922 is 2295081.

It is a super-2 number, since 2×1805922² = 6522708540168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2547 + ... + 3177.

It is an arithmetic number, because the mean of its divisors is an integer number (127980).

2^1805922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1805922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2047680).

1805922 is an abundant number, since it is smaller than the sum of its proper divisors (2289438).

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

1805922 is a wasteful number, since it uses less digits than its factorization.

1805922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1805922 is about 1343.8459733169. The cubic root of 1805922 is about 121.7772968435. Note that the first 3 decimals are identical.

It can be divided in two parts, 18059 and 22, that added together give a palindrome (18081).

The spelling of 1805922 in words is "one million, eight hundred five thousand, nine hundred twenty-two".