2780258305 has 16 divisors (see below), whose sum is σ = 3699281088. Its totient is φ = 1988856000.

The previous prime is 2780258303. The next prime is 2780258317. The reversal of 2780258305 is 5038520872.

It is not a de Polignac number, because 2780258305 - 2¹ = 2780258303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780258303) 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 15 ways as a sum of consecutive naturals, for example, 410991 + ... + 417700.

It is an arithmetic number, because the mean of its divisors is an integer number (231205068).

Almost surely, 2^2780258305 is an apocalyptic number.

It is an amenable number.

2780258305 is a deficient number, since it is larger than the sum of its proper divisors (919022783).

2780258305 is a wasteful number, since it uses less digits than its factorization.

2780258305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828768.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 2780258305 is about 52728.1547657416. The cubic root of 2780258305 is about 1406.1394158836.

The spelling of 2780258305 in words is "two billion, seven hundred eighty million, two hundred fifty-eight thousand, three hundred five".