2808281 has 8 divisors (see below), whose sum is σ = 3398400. Its totient is φ = 2265408.

The previous prime is 2808269. The next prime is 2808293. The reversal of 2808281 is 1828082.

It is an interprime number because it is at equal distance from previous prime (2808269) and next prime (2808293).

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 2808281 - 2¹⁴ = 2791897 is a prime.

It is a super-2 number, since 2×2808281² = 15772884349922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2808241) 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 7 ways as a sum of consecutive naturals, for example, 11681 + ... + 11918.

It is an arithmetic number, because the mean of its divisors is an integer number (424800).

2^2808281 is an apocalyptic number.

It is an amenable number.

2808281 is a deficient number, since it is larger than the sum of its proper divisors (590119).

2808281 is a wasteful number, since it uses less digits than its factorization.

2808281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23623.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 2808281 is about 1675.7926482713. The cubic root of 2808281 is about 141.0847871251.

The spelling of 2808281 in words is "two million, eight hundred eight thousand, two hundred eighty-one".