8256140 has 12 divisors (see below), whose sum is σ = 17337936. Its totient is φ = 3302448.

The previous prime is 8256139. The next prime is 8256173. The reversal of 8256140 is 416528.

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, 206384 + ... + 206423.

It is an arithmetic number, because the mean of its divisors is an integer number (1444828).

Almost surely, 2^8256140 is an apocalyptic number.

It is an amenable number.

8256140 is an abundant number, since it is smaller than the sum of its proper divisors (9081796).

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

8256140 is a wasteful number, since it uses less digits than its factorization.

8256140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412816 (or 412814 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 8256140 is about 2873.3499612821. The cubic root of 8256140 is about 202.1121163050.

The spelling of 8256140 in words is "eight million, two hundred fifty-six thousand, one hundred forty".