2856717249 has 8 divisors (see below), whose sum is σ = 3861134112. Its totient is φ = 1878389280.

The previous prime is 2856717217. The next prime is 2856717307. The reversal of 2856717249 is 9427176582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2856717249 - 2⁵ = 2856717217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2856717209) 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 7 ways as a sum of consecutive naturals, for example, 6521967 + ... + 6522404.

It is an arithmetic number, because the mean of its divisors is an integer number (482641764).

Almost surely, 2^2856717249 is an apocalyptic number.

It is an amenable number.

2856717249 is a deficient number, since it is larger than the sum of its proper divisors (1004416863).

2856717249 is a wasteful number, since it uses less digits than its factorization.

2856717249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13044447.

The product of its digits is 1693440, while the sum is 51.

The square root of 2856717249 is about 53448.2670345821. The cubic root of 2856717249 is about 1418.9129498671.

The spelling of 2856717249 in words is "two billion, eight hundred fifty-six million, seven hundred seventeen thousand, two hundred forty-nine".