810444810 has 96 divisors (see below), whose sum is σ = 2381797440. Its totient is φ = 175488768.

The previous prime is 810444737. The next prime is 810444839. The reversal of 810444810 is 18444018.

It is a super-2 number, since 2×810444810² = 1313641580111872200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13422 + ... + 42438.

It is an arithmetic number, because the mean of its divisors is an integer number (24810390).

Almost surely, 2^810444810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 810444810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1190898720).

810444810 is an abundant number, since it is smaller than the sum of its proper divisors (1571352630).

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

810444810 is a wasteful number, since it uses less digits than its factorization.

810444810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29060 (or 29053 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 810444810 is about 28468.3123841228. The cubic root of 810444810 is about 932.3403536591.

Adding to 810444810 its reverse (18444018), we get a palindrome (828888828).

The spelling of 810444810 in words is "eight hundred ten million, four hundred forty-four thousand, eight hundred ten".