2520636 has 12 divisors (see below), whose sum is σ = 5881512. Its totient is φ = 840208.

The previous prime is 2520631. The next prime is 2520649. The reversal of 2520636 is 6360252.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105015 + ... + 105038.

It is an arithmetic number, because the mean of its divisors is an integer number (490126).

2^2520636 is an apocalyptic number.

It is an amenable number.

2520636 is an abundant number, since it is smaller than the sum of its proper divisors (3360876).

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

2520636 is a wasteful number, since it uses less digits than its factorization.

2520636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210060 (or 210058 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 2520636 is about 1587.6510951717. The cubic root of 2520636 is about 136.0932895111.

Adding to 2520636 its reverse (6360252), we get a palindrome (8880888).

The spelling of 2520636 in words is "two million, five hundred twenty thousand, six hundred thirty-six".