6497720 has 32 divisors (see below), whose sum is σ = 14865120. Its totient is φ = 2555520.

The previous prime is 6497717. The next prime is 6497737. The reversal of 6497720 is 277946.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1109 + ... + 3771.

It is an arithmetic number, because the mean of its divisors is an integer number (464535).

Almost surely, 2^6497720 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 6497720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7432560).

6497720 is an abundant number, since it is smaller than the sum of its proper divisors (8367400).

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

6497720 is a wasteful number, since it uses less digits than its factorization.

6497720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735 (or 2731 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 6497720 is about 2549.0625727902. The cubic root of 6497720 is about 186.6037344546.

The spelling of 6497720 in words is "six million, four hundred ninety-seven thousand, seven hundred twenty".