800840840 has 16 divisors (see below), whose sum is σ = 1801891980. Its totient is φ = 320336320.

The previous prime is 800840801. The next prime is 800840867. The reversal of 800840840 is 48048008.

It can be written as a sum of positive squares in 2 ways, for example, as 800097796 + 743044 = 28286^2 + 862^2 .

It is a junction number, because it is equal to n+sod(n) for n = 800840797 and 800840806.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10010471 + ... + 10010550.

Almost surely, 2^800840840 is an apocalyptic number.

It is an amenable number.

800840840 is an abundant number, since it is smaller than the sum of its proper divisors (1001051140).

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

800840840 is a wasteful number, since it uses less digits than its factorization.

800840840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20021032 (or 20021028 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 800840840 is about 28299.1314354346. The cubic root of 800840840 is about 928.6428889721.

Adding to 800840840 its reverse (48048008), we get a palindrome (848888848).

The spelling of 800840840 in words is "eight hundred million, eight hundred forty thousand, eight hundred forty".