2590866 has 28 divisors (see below), whose sum is σ = 5830062. Its totient is φ = 863136.

The previous prime is 2590837. The next prime is 2590871. The reversal of 2590866 is 6680952.

2590866 is a `hidden beast` number, since 2 + 590 + 8 + 66 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2205225 + 385641 = 1485^2 + 621^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2590866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 570 + ... + 2346.

2^2590866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2590866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2915031).

2590866 is an abundant number, since it is smaller than the sum of its proper divisors (3239196).

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

2590866 is an equidigital number, since it uses as much as digits as its factorization.

2590866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797 (or 1782 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2590866 is about 1609.6167245652. The cubic root of 2590866 is about 137.3456736850.

The spelling of 2590866 in words is "two million, five hundred ninety thousand, eight hundred sixty-six".