2639560 has 64 divisors (see below), whose sum is σ = 7413120. Its totient is φ = 821760.

The previous prime is 2639521. The next prime is 2639561. The reversal of 2639560 is 659362.

It is not an unprimeable number, because it can be changed into a prime (2639561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2652 + ... + 3508.

It is an arithmetic number, because the mean of its divisors is an integer number (115830).

2^2639560 is an apocalyptic number.

2639560 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 2639560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3706560).

2639560 is an abundant number, since it is smaller than the sum of its proper divisors (4773560).

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

2639560 is a wasteful number, since it uses less digits than its factorization.

2639560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 2639560 is about 1624.6722746450. The cubic root of 2639560 is about 138.2007859256.

The spelling of 2639560 in words is "two million, six hundred thirty-nine thousand, five hundred sixty".