810019140 has 96 divisors (see below), whose sum is σ = 2641040640. Its totient is φ = 181648896.

The previous prime is 810019139. The next prime is 810019163. The reversal of 810019140 is 41910018.

It is a super-2 number, since 2×810019140² = 1312262014332679200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 810019140.

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, 4066 + ... + 40454.

It is an arithmetic number, because the mean of its divisors is an integer number (27510840).

Almost surely, 2^810019140 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 810019140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320520320).

810019140 is an abundant number, since it is smaller than the sum of its proper divisors (1831021500).

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

810019140 is a wasteful number, since it uses less digits than its factorization.

810019140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36461 (or 36459 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 810019140 is about 28460.8351950536. The cubic root of 810019140 is about 932.1770940037.

Adding to 810019140 its reverse (41910018), we get a palindrome (851929158).

The spelling of 810019140 in words is "eight hundred ten million, nineteen thousand, one hundred forty".