1813830 has 32 divisors (see below), whose sum is σ = 4402944. Its totient is φ = 478176.

The previous prime is 1813829. The next prime is 1813843. The reversal of 1813830 is 383181.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1813830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2797 + ... + 3383.

It is an arithmetic number, because the mean of its divisors is an integer number (137592).

2^1813830 is an apocalyptic number.

1813830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1813830 is an abundant number, since it is smaller than the sum of its proper divisors (2589114).

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

1813830 is a wasteful number, since it uses less digits than its factorization.

1813830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1813830 is about 1346.7850608022. The cubic root of 1813830 is about 121.9547893036.

The spelling of 1813830 in words is "one million, eight hundred thirteen thousand, eight hundred thirty".