2689281 has 56 divisors (see below), whose sum is σ = 5036544. Its totient is φ = 1399680.

The previous prime is 2689277. The next prime is 2689289. The reversal of 2689281 is 1829862.

It is not a de Polignac number, because 2689281 - 2² = 2689277 is a prime.

It is a super-2 number, since 2×2689281² = 14464464593922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2689289) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 86736 + ... + 86766.

2^2689281 is an apocalyptic number.

2689281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2689281 is a deficient number, since it is larger than the sum of its proper divisors (2347263).

2689281 is an equidigital number, since it uses as much as digits as its factorization.

2689281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 58 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 2689281 is about 1639.9027410185. The cubic root of 2689281 is about 139.0631495404.

The spelling of 2689281 in words is "two million, six hundred eighty-nine thousand, two hundred eighty-one".