1843420 has 24 divisors (see below), whose sum is σ = 3937248. Its totient is φ = 724800.

The previous prime is 1843357. The next prime is 1843421. The reversal of 1843420 is 243481.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1843391 and 1843400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1843421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465 + ... + 1975.

It is an arithmetic number, because the mean of its divisors is an integer number (164052).

2^1843420 is an apocalyptic number.

1843420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1843420 is an abundant number, since it is smaller than the sum of its proper divisors (2093828).

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

1843420 is a wasteful number, since it uses less digits than its factorization.

1843420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581 (or 1579 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1843420 is about 1357.7260401127. The cubic root of 1843420 is about 122.6143871161.

The spelling of 1843420 in words is "one million, eight hundred forty-three thousand, four hundred twenty".