2811838309 has 32 divisors (see below), whose sum is σ = 3391165440. Its totient is φ = 2282656896.

The previous prime is 2811838259. The next prime is 2811838313. The reversal of 2811838309 is 9038381182.

It is not a de Polignac number, because 2811838309 - 2¹⁷ = 2811707237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2811838319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38518297 + ... + 38518369.

It is an arithmetic number, because the mean of its divisors is an integer number (105973920).

Almost surely, 2^2811838309 is an apocalyptic number.

It is an amenable number.

2811838309 is a deficient number, since it is larger than the sum of its proper divisors (579327131).

2811838309 is an frugal number, since it uses more digits than its factorization.

2811838309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 2811838309 is about 53026.7697394439. The cubic root of 2811838309 is about 1411.4433368488.

The spelling of 2811838309 in words is "two billion, eight hundred eleven million, eight hundred thirty-eight thousand, three hundred nine".