8243140 has 12 divisors (see below), whose sum is σ = 17310636. Its totient is φ = 3297248.

The previous prime is 8243107. The next prime is 8243149. The reversal of 8243140 is 413428.

It can be written as a sum of positive squares in 2 ways, for example, as 5447556 + 2795584 = 2334^2 + 1672^2 .

It is not an unprimeable number, because it can be changed into a prime (8243149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206059 + ... + 206098.

It is an arithmetic number, because the mean of its divisors is an integer number (1442553).

Almost surely, 2^8243140 is an apocalyptic number.

It is an amenable number.

8243140 is an abundant number, since it is smaller than the sum of its proper divisors (9067496).

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

8243140 is a wasteful number, since it uses less digits than its factorization.

8243140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412166 (or 412164 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 8243140 is about 2871.0869022027. The cubic root of 8243140 is about 202.0059796289.

Adding to 8243140 its reverse (413428), we get a palindrome (8656568).

The spelling of 8243140 in words is "eight million, two hundred forty-three thousand, one hundred forty".