2780828605 has 8 divisors (see below), whose sum is σ = 3337434072. Its totient is φ = 2224369728.

The previous prime is 2780828599. The next prime is 2780828623. The reversal of 2780828605 is 5068280872.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 442429156 + 2338399449 = 21034^2 + 48357^2 .

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 2780828605 - 2¹¹ = 2780826557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10639 + ... + 75331.

It is an arithmetic number, because the mean of its divisors is an integer number (417179259).

Almost surely, 2^2780828605 is an apocalyptic number.

It is an amenable number.

2780828605 is a deficient number, since it is larger than the sum of its proper divisors (556605467).

2780828605 is an equidigital number, since it uses as much as digits as its factorization.

2780828605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73295.

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 2780828605 is about 52733.5624152209. The cubic root of 2780828605 is about 1406.2355540113.

The spelling of 2780828605 in words is "two billion, seven hundred eighty million, eight hundred twenty-eight thousand, six hundred five".