2782287 has 12 divisors (see below), whose sum is σ = 4193904. Its totient is φ = 1774080.

The previous prime is 2782279. The next prime is 2782291. The reversal of 2782287 is 7822872.

It is not a de Polignac number, because 2782287 - 2³ = 2782279 is a prime.

It is a super-2 number, since 2×2782287² = 15482241900738, which contains 22 as substring.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2782217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6514 + ... + 6927.

It is an arithmetic number, because the mean of its divisors is an integer number (349492).

2^2782287 is an apocalyptic number.

2782287 is a deficient number, since it is larger than the sum of its proper divisors (1411617).

2782287 is a wasteful number, since it uses less digits than its factorization.

2782287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13470 (or 13467 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 2782287 is about 1668.0188847852. The cubic root of 2782287 is about 140.6481342680.

The spelling of 2782287 in words is "two million, seven hundred eighty-two thousand, two hundred eighty-seven".