2687564 has 24 divisors (see below), whose sum is σ = 5434128. Its totient is φ = 1149440.

The previous prime is 2687557. The next prime is 2687567. The reversal of 2687564 is 4657862.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2687567) 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 7 ways as a sum of consecutive naturals, for example, 1049 + ... + 2544.

It is an arithmetic number, because the mean of its divisors is an integer number (226422).

2^2687564 is an apocalyptic number.

It is an amenable number.

2687564 is an abundant number, since it is smaller than the sum of its proper divisors (2746564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2687564 is a wasteful number, since it uses less digits than its factorization.

2687564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3625 (or 3623 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 2687564 is about 1639.3791507763. The cubic root of 2687564 is about 139.0335477917.

The spelling of 2687564 in words is "two million, six hundred eighty-seven thousand, five hundred sixty-four".