1813000 has 96 divisors (see below), whose sum is σ = 5068440. Its totient is φ = 604800.

The previous prime is 1812989. The next prime is 1813001. The reversal of 1813000 is 3181.

It can be written as a sum of positive squares in 4 ways, for example, as 933156 + 879844 = 966^2 + 938^2 .

It is not an unprimeable number, because it can be changed into a prime (1813001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48982 + ... + 49018.

2^1813000 is an apocalyptic number.

1813000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1813000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2534220).

1813000 is an abundant number, since it is smaller than the sum of its proper divisors (3255440).

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

1813000 is a wasteful number, since it uses less digits than its factorization.

1813000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1813000 is about 1346.4768843170. The cubic root of 1813000 is about 121.9361844879.

Adding to 1813000 its reverse (3181), we get a palindrome (1816181).

The spelling of 1813000 in words is "one million, eight hundred thirteen thousand".