2563660 has 48 divisors (see below), whose sum is σ = 6031872. Its totient is φ = 907200.

The previous prime is 2563657. The next prime is 2563661. The reversal of 2563660 is 663652.

2563660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9325 + ... + 9595.

It is an arithmetic number, because the mean of its divisors is an integer number (125664).

2^2563660 is an apocalyptic number.

2563660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2563660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3015936).

2563660 is an abundant number, since it is smaller than the sum of its proper divisors (3468212).

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

2563660 is a wasteful number, since it uses less digits than its factorization.

2563660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 2563660 is about 1601.1433414907. The cubic root of 2563660 is about 136.8632375233.

It can be divided in two parts, 2563 and 660, that added together give a palindrome (3223).

The spelling of 2563660 in words is "two million, five hundred sixty-three thousand, six hundred sixty".