6520744 has 16 divisors (see below), whose sum is σ = 12287520. Its totient is φ = 3244080.

The previous prime is 6520727. The next prime is 6520747. The reversal of 6520744 is 4470256.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6520747) 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, 244 + ... + 3619.

It is an arithmetic number, because the mean of its divisors is an integer number (767970).

Almost surely, 2^6520744 is an apocalyptic number.

It is an amenable number.

6520744 is a deficient number, since it is larger than the sum of its proper divisors (5766776).

6520744 is a wasteful number, since it uses less digits than its factorization.

6520744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080 (or 4076 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 6520744 is about 2553.5747492486. The cubic root of 6520744 is about 186.8238783293.

The spelling of 6520744 in words is "six million, five hundred twenty thousand, seven hundred forty-four".