2640580 has 24 divisors (see below), whose sum is σ = 5725440. Its totient is φ = 1021920.

The previous prime is 2640577. The next prime is 2640581. The reversal of 2640580 is 850462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1510 + ... + 2749.

It is an arithmetic number, because the mean of its divisors is an integer number (238560).

2^2640580 is an apocalyptic number.

2640580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640580 is an abundant number, since it is smaller than the sum of its proper divisors (3084860).

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

2640580 is a wasteful number, since it uses less digits than its factorization.

2640580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299 (or 4297 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2640580 is about 1624.9861537872. The cubic root of 2640580 is about 138.2185851861.

The spelling of 2640580 in words is "two million, six hundred forty thousand, five hundred eighty".