1810800 has 90 divisors (see below), whose sum is σ = 6296472. Its totient is φ = 481920.

The previous prime is 1810799. The next prime is 1810819. The reversal of 1810800 is 80181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (90).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3349 + ... + 3851.

2^1810800 is an apocalyptic number.

1810800 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 1810800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3148236).

1810800 is an abundant number, since it is smaller than the sum of its proper divisors (4485672).

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

1810800 is a wasteful number, since it uses less digits than its factorization.

1810800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 1810800 is about 1345.6596895203. The cubic root of 1810800 is about 121.8868430306.

Adding to 1810800 its reverse (80181), we get a palindrome (1890981).

The spelling of 1810800 in words is "one million, eight hundred ten thousand, eight hundred".