2686028409 has 6 divisors (see below), whose sum is σ = 3879818826. Its totient is φ = 1790685600.

The previous prime is 2686028399. The next prime is 2686028437. The reversal of 2686028409 is 9048206862.

It can be written as a sum of positive squares in only one way, i.e., 2190520809 + 495507600 = 46803^2 + 22260^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2686028409 is a prime.

It is a super-2 number, since 2×2686028409² = 14429497227910142562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2686038409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 149223792 + ... + 149223809.

It is an arithmetic number, because the mean of its divisors is an integer number (646636471).

Almost surely, 2^2686028409 is an apocalyptic number.

It is an amenable number.

2686028409 is a deficient number, since it is larger than the sum of its proper divisors (1193790417).

2686028409 is a wasteful number, since it uses less digits than its factorization.

2686028409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298447607 (or 298447604 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 2686028409 is about 51826.9081558991. The cubic root of 2686028409 is about 1390.0706292286.

The spelling of 2686028409 in words is "two billion, six hundred eighty-six million, twenty-eight thousand, four hundred nine".