1813340 has 24 divisors (see below), whose sum is σ = 3864672. Its totient is φ = 714560.

The previous prime is 1813337. The next prime is 1813351. The reversal of 1813340 is 433181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782 + ... + 2058.

It is an arithmetic number, because the mean of its divisors is an integer number (161028).

2^1813340 is an apocalyptic number.

1813340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1813340 is an abundant number, since it is smaller than the sum of its proper divisors (2051332).

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

1813340 is a wasteful number, since it uses less digits than its factorization.

1813340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1355 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1813340 is about 1346.6031338149. The cubic root of 1813340 is about 121.9438064242.

The spelling of 1813340 in words is "one million, eight hundred thirteen thousand, three hundred forty".