6481720 has 48 divisors (see below), whose sum is σ = 16970040. Its totient is φ = 2221632.

The previous prime is 6481711. The next prime is 6481729. The reversal of 6481720 is 271846.

It is an interprime number because it is at equal distance from previous prime (6481711) and next prime (6481729).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6481729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307 + ... + 3613.

Almost surely, 2^6481720 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 6481720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8485020).

6481720 is an abundant number, since it is smaller than the sum of its proper divisors (10488320).

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

6481720 is a wasteful number, since it uses less digits than its factorization.

6481720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332 (or 3321 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 6481720 is about 2545.9222297627. The cubic root of 6481720 is about 186.4504440829.

The spelling of 6481720 in words is "six million, four hundred eighty-one thousand, seven hundred twenty".