2623566 has 32 divisors (see below), whose sum is σ = 5787648. Its totient is φ = 786240.

The previous prime is 2623531. The next prime is 2623567. The reversal of 2623566 is 6653262.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2623567) 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 15 ways as a sum of consecutive naturals, for example, 8226 + ... + 8538.

It is an arithmetic number, because the mean of its divisors is an integer number (180864).

2^2623566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2623566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2893824).

2623566 is an abundant number, since it is smaller than the sum of its proper divisors (3164082).

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

2623566 is a wasteful number, since it uses less digits than its factorization.

2623566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456.

The product of its digits is 12960, while the sum is 30.

The square root of 2623566 is about 1619.7425721392. The cubic root of 2623566 is about 137.9210848958.

It can be divided in two parts, 262 and 3566, that added together give a triangular number (3828 = T₈₇).

The spelling of 2623566 in words is "two million, six hundred twenty-three thousand, five hundred sixty-six".