8130840 has 32 divisors (see below), whose sum is σ = 24392880. Its totient is φ = 2168192.

The previous prime is 8130839. The next prime is 8130851. The reversal of 8130840 is 480318.

It is a super-2 number, since 2×8130840² = 132221118211200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 8130840.

It is a congruent 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, 33759 + ... + 33998.

Almost surely, 2^8130840 is an apocalyptic number.

It is an amenable number.

8130840 is an abundant number, since it is smaller than the sum of its proper divisors (16262040).

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

8130840 is a wasteful number, since it uses less digits than its factorization.

8130840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67771 (or 67767 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 8130840 is about 2851.4627825030. The cubic root of 8130840 is about 201.0844426266.

The spelling of 8130840 in words is "eight million, one hundred thirty thousand, eight hundred forty".