6440572 has 12 divisors (see below), whose sum is σ = 11319840. Its totient is φ = 3206336.

The previous prime is 6440561. The next prime is 6440579. The reversal of 6440572 is 2750446.

It is a self number, because there is not a number n which added to its sum of digits gives 6440572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440579) 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, 2413 + ... + 4324.

It is an arithmetic number, because the mean of its divisors is an integer number (943320).

Almost surely, 2^6440572 is an apocalyptic number.

It is an amenable number.

6440572 is a deficient number, since it is larger than the sum of its proper divisors (4879268).

6440572 is a wasteful number, since it uses less digits than its factorization.

6440572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6980 (or 6978 counting only the distinct ones).

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

The square root of 6440572 is about 2537.8282053756. The cubic root of 6440572 is about 186.0550575052.

The spelling of 6440572 in words is "six million, four hundred forty thousand, five hundred seventy-two".