2839718421 has 24 divisors (see below), whose sum is σ = 4181286200. Its totient is φ = 1856649600.

The previous prime is 2839718417. The next prime is 2839718423. The reversal of 2839718421 is 1248179382.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 92910321 + 2746808100 = 9639^2 + 52410^2 .

It is not a de Polignac number, because 2839718421 - 2² = 2839718417 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2839718423) 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 23 ways as a sum of consecutive naturals, for example, 184191 + ... + 199011.

Almost surely, 2^2839718421 is an apocalyptic number.

It is an amenable number.

2839718421 is a deficient number, since it is larger than the sum of its proper divisors (1341567779).

2839718421 is a wasteful number, since it uses less digits than its factorization.

2839718421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15237 (or 15234 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 2839718421 is about 53289.0084445188. The cubic root of 2839718421 is about 1416.0929464149.

The spelling of 2839718421 in words is "two billion, eight hundred thirty-nine million, seven hundred eighteen thousand, four hundred twenty-one".