810810 has 160 divisors (see below), whose sum is σ = 2927232. Its totient is φ = 155520.

The previous prime is 810809. The next prime is 810839. The reversal of 810810 is 18018.

Added to its reverse (18018) it gives a triangular number (828828 = T₁₂₈₇).

It is a happy number.

It is a super-2 number, since 2×810810² = 1314825712200, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 62364 + ... + 62376.

2⁸¹⁰⁸¹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 810810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463616).

810810 is an abundant number, since it is smaller than the sum of its proper divisors (2116422).

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

810810 is a wasteful number, since it uses less digits than its factorization.

810810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50 (or 41 counting only the distinct ones).

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

The square root of 810810 is about 900.4498875562. The cubic root of 810810 is about 93.2480371520.

Adding to 810810 its reverse (18018), we get a palindrome (828828).

810810 divided by its reverse (18018) gives a triangular number (45 = T₉).

It can be divided in two parts, 8108 and 10, that added together give a palindrome (8118).

The spelling of 810810 in words is "eight hundred ten thousand, eight hundred ten".