2640522 has 8 divisors (see below), whose sum is σ = 5281056. Its totient is φ = 880172.

The previous prime is 2640511. The next prime is 2640527. The reversal of 2640522 is 2250462.

It is a sphenic number, since it is the product of 3 distinct primes.

2640522 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2640527) 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, 220038 + ... + 220049.

It is an arithmetic number, because the mean of its divisors is an integer number (660132).

2^2640522 is an apocalyptic number.

2640522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2640522 is a wasteful number, since it uses less digits than its factorization.

2640522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440092.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2640522 is about 1624.9683073833. The cubic root of 2640522 is about 138.2175731942.

Adding to 2640522 its reverse (2250462), we get a palindrome (4890984).

The spelling of 2640522 in words is "two million, six hundred forty thousand, five hundred twenty-two".