2780343449 has 8 divisors (see below), whose sum is σ = 3005870280. Its totient is φ = 2556481536.

The previous prime is 2780343439. The next prime is 2780343451. The reversal of 2780343449 is 9443430872.

2780343449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 974688400 + 1805655049 = 31220^2 + 42493^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2780343449 - 2⁸ = 2780343193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780343439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412754 + ... + 419435.

It is an arithmetic number, because the mean of its divisors is an integer number (375733785).

Almost surely, 2^2780343449 is an apocalyptic number.

It is an amenable number.

2780343449 is a deficient number, since it is larger than the sum of its proper divisors (225526831).

2780343449 is a wasteful number, since it uses less digits than its factorization.

2780343449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832459.

The product of its (nonzero) digits is 580608, while the sum is 44.

The square root of 2780343449 is about 52728.9621460540. The cubic root of 2780343449 is about 1406.1537698391.

The spelling of 2780343449 in words is "two billion, seven hundred eighty million, three hundred forty-three thousand, four hundred forty-nine".