6512440 has 96 divisors (see below), whose sum is σ = 17282160. Its totient is φ = 2188800.

The previous prime is 6512437. The next prime is 6512447. The reversal of 6512440 is 442156.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6512447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158820 + ... + 158860.

Almost surely, 2^6512440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6512440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8641080).

6512440 is an abundant number, since it is smaller than the sum of its proper divisors (10769720).

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

6512440 is a wasteful number, since it uses less digits than its factorization.

6512440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 6512440 is about 2551.9482753379. The cubic root of 6512440 is about 186.7445395043.

Adding to 6512440 its reverse (442156), we get a palindrome (6954596).

The spelling of 6512440 in words is "six million, five hundred twelve thousand, four hundred forty".