2878281 has 32 divisors (see below), whose sum is σ = 4954880. Its totient is φ = 1617408.

The previous prime is 2878247. The next prime is 2878297. The reversal of 2878281 is 1828782.

It is not a de Polignac number, because 2878281 - 2⁷ = 2878153 is a prime.

It is a super-2 number, since 2×2878281² = 16569003029922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2878231) 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 31 ways as a sum of consecutive naturals, for example, 18255 + ... + 18411.

It is an arithmetic number, because the mean of its divisors is an integer number (154840).

2^2878281 is an apocalyptic number.

2878281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2878281 is a deficient number, since it is larger than the sum of its proper divisors (2076599).

2878281 is a wasteful number, since it uses less digits than its factorization.

2878281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 264 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 2878281 is about 1696.5497340190. The cubic root of 2878281 is about 142.2474196033.

The spelling of 2878281 in words is "two million, eight hundred seventy-eight thousand, two hundred eighty-one".