2881280905 has 4 divisors (see below), whose sum is σ = 3457537092. Its totient is φ = 2305024720.

The previous prime is 2881280881. The next prime is 2881280917. The reversal of 2881280905 is 5090821882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5090821882 = 2 ⋅2545410941.

It can be written as a sum of positive squares in 2 ways, for example, as 602555209 + 2278725696 = 24547^2 + 47736^2 .

It is not a de Polignac number, because 2881280905 - 2²⁵ = 2847726473 is a prime.

It is a super-3 number, since 3×2881280905³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288128086 + ... + 288128095.

It is an arithmetic number, because the mean of its divisors is an integer number (864384273).

Almost surely, 2^2881280905 is an apocalyptic number.

It is an amenable number.

2881280905 is a deficient number, since it is larger than the sum of its proper divisors (576256187).

2881280905 is an equidigital number, since it uses as much as digits as its factorization.

2881280905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576256186.

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 2881280905 is about 53677.5642610579. The cubic root of 2881280905 is about 1422.9682184228.

The spelling of 2881280905 in words is "two billion, eight hundred eighty-one million, two hundred eighty thousand, nine hundred five".