6528644 has 12 divisors (see below), whose sum is σ = 11461968. Its totient is φ = 3253800.

The previous prime is 6528637. The next prime is 6528649. The reversal of 6528644 is 4468256.

It is not an unprimeable number, because it can be changed into a prime (6528649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1142 + ... + 3789.

It is an arithmetic number, because the mean of its divisors is an integer number (955164).

Almost surely, 2^6528644 is an apocalyptic number.

It is an amenable number.

6528644 is a deficient number, since it is larger than the sum of its proper divisors (4933324).

6528644 is a wasteful number, since it uses less digits than its factorization.

6528644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5266 (or 5264 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 6528644 is about 2555.1211321579. The cubic root of 6528644 is about 186.8992947240.

It can be divided in two parts, 652864 and 4, that multiplied together give a square (2611456 = 1616²).

The spelling of 6528644 in words is "six million, five hundred twenty-eight thousand, six hundred forty-four".