2687258 has 24 divisors (see below), whose sum is σ = 4967892. Its totient is φ = 1083264.

The previous prime is 2687257. The next prime is 2687261. The reversal of 2687258 is 8527862.

It can be written as a sum of positive squares in 2 ways, for example, as 2569609 + 117649 = 1603^2 + 343^2 .

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2687257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 860 + ... + 2472.

2^2687258 is an apocalyptic number.

2687258 is a deficient number, since it is larger than the sum of its proper divisors (2280634).

2687258 is a wasteful number, since it uses less digits than its factorization.

2687258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646 (or 1639 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 2687258 is about 1639.2858201058. The cubic root of 2687258 is about 139.0282709089.

The spelling of 2687258 in words is "two million, six hundred eighty-seven thousand, two hundred fifty-eight".