2840265909 has 12 divisors (see below), whose sum is σ = 4418191596. Its totient is φ = 1747855872.

The previous prime is 2840265881. The next prime is 2840265913. The reversal of 2840265909 is 9095620482.

It can be written as a sum of positive squares in 2 ways, for example, as 1833980625 + 1006285284 = 42825^2 + 31722^2 .

It is not a de Polignac number, because 2840265909 - 2⁹ = 2840265397 is a prime.

It is a super-2 number, since 2×2840265909² = 16134220867655192562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840265209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12137772 + ... + 12138005.

It is an arithmetic number, because the mean of its divisors is an integer number (368182633).

Almost surely, 2^2840265909 is an apocalyptic number.

It is an amenable number.

2840265909 is a deficient number, since it is larger than the sum of its proper divisors (1577925687).

2840265909 is a wasteful number, since it uses less digits than its factorization.

2840265909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24275796 (or 24275793 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 2840265909 is about 53294.1451662375. The cubic root of 2840265909 is about 1416.1839465260.

The spelling of 2840265909 in words is "two billion, eight hundred forty million, two hundred sixty-five thousand, nine hundred nine".