810993000 has 128 divisors (see below), whose sum is σ = 2561569920. Its totient is φ = 213593600.

The previous prime is 810992999. The next prime is 810993011. The reversal of 810993000 is 399018.

It is a happy number.

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 (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247372 + ... + 250628.

It is an arithmetic number, because the mean of its divisors is an integer number (20012265).

Almost surely, 2^810993000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 810993000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280784960).

810993000 is an abundant number, since it is smaller than the sum of its proper divisors (1750576920).

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

810993000 is a wasteful number, since it uses less digits than its factorization.

810993000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364 (or 3350 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 810993000 is about 28477.9388299083. The cubic root of 810993000 is about 932.5505199194.

The spelling of 810993000 in words is "eight hundred ten million, nine hundred ninety-three thousand".