8000840 has 32 divisors (see below), whose sum is σ = 18144000. Its totient is φ = 3175104.

The previous prime is 8000831. The next prime is 8000869. The reversal of 8000840 is 480008.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4841 + ... + 6279.

It is an arithmetic number, because the mean of its divisors is an integer number (567000).

Almost surely, 2^8000840 is an apocalyptic number.

It is an amenable number.

8000840 is an abundant number, since it is smaller than the sum of its proper divisors (10143160).

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

8000840 is a wasteful number, since it uses less digits than its factorization.

8000840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 1585 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 8000840 is about 2828.5756132725. The cubic root of 8000840 is about 200.0069997550.

Adding to 8000840 its reverse (480008), we get a palindrome (8480848).

The spelling of 8000840 in words is "eight million, eight hundred forty", and thus it is an aban number.