1805340 has 24 divisors (see below), whose sum is σ = 5055120. Its totient is φ = 481408.

The previous prime is 1805327. The next prime is 1805357. The reversal of 1805340 is 435081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14985 + ... + 15104.

It is an arithmetic number, because the mean of its divisors is an integer number (210630).

2^1805340 is an apocalyptic number.

1805340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1805340 is an abundant number, since it is smaller than the sum of its proper divisors (3249780).

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

1805340 is a wasteful number, since it uses less digits than its factorization.

1805340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30101 (or 30099 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1805340 is about 1343.6294131940. The cubic root of 1805340 is about 121.7642135907.

It can be divided in two parts, 1805 and 340, that added together give a triangular number (2145 = T₆₅).

The spelling of 1805340 in words is "one million, eight hundred five thousand, three hundred forty".