2636540 has 24 divisors (see below), whose sum is σ = 5569872. Its totient is φ = 1048320.

The previous prime is 2636539. The next prime is 2636549. The reversal of 2636540 is 456362.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2636549) 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, 4547 + ... + 5093.

It is an arithmetic number, because the mean of its divisors is an integer number (232078).

2^2636540 is an apocalyptic number.

2636540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2636540 is an abundant number, since it is smaller than the sum of its proper divisors (2933332).

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

2636540 is a wasteful number, since it uses less digits than its factorization.

2636540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2636540 is about 1623.7425904373. The cubic root of 2636540 is about 138.1480592529.

The spelling of 2636540 in words is "two million, six hundred thirty-six thousand, five hundred forty".