2809861346 has 4 divisors (see below), whose sum is σ = 4214792022. Its totient is φ = 1404930672.

The previous prime is 2809861267. The next prime is 2809861357. The reversal of 2809861346 is 6431689082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1608892321 + 1200969025 = 40111^2 + 34655^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2809861346.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702465335 + ... + 702465338.

Almost surely, 2^2809861346 is an apocalyptic number.

2809861346 is a deficient number, since it is larger than the sum of its proper divisors (1404930676).

2809861346 is a wasteful number, since it uses less digits than its factorization.

2809861346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404930675.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 2809861346 is about 53008.1252828281. The cubic root of 2809861346 is about 1411.1124708033.

The spelling of 2809861346 in words is "two billion, eight hundred nine million, eight hundred sixty-one thousand, three hundred forty-six".