2646564 has 48 divisors (see below), whose sum is σ = 6623232. Its totient is φ = 820512.

The previous prime is 2646551. The next prime is 2646571. The reversal of 2646564 is 4656462.

It is an unprimeable number.

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, 11757 + ... + 11979.

It is an arithmetic number, because the mean of its divisors is an integer number (137984).

2^2646564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2646564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3311616).

2646564 is an abundant number, since it is smaller than the sum of its proper divisors (3976668).

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

2646564 is a wasteful number, since it uses less digits than its factorization.

2646564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 294 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 2646564 is about 1626.8263582817. The cubic root of 2646564 is about 138.3229152974.

The spelling of 2646564 in words is "two million, six hundred forty-six thousand, five hundred sixty-four".