6981720 has 64 divisors (see below), whose sum is σ = 21258720. Its totient is φ = 1833984.

The previous prime is 6981703. The next prime is 6981731. The reversal of 6981720 is 271896.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8362 + ... + 9158.

Almost surely, 2^6981720 is an apocalyptic number.

6981720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6981720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10629360).

6981720 is an abundant number, since it is smaller than the sum of its proper divisors (14277000).

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

6981720 is a wasteful number, since it uses less digits than its factorization.

6981720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 6981720 is about 2642.2944574744. The cubic root of 6981720 is about 191.1264570134.

The spelling of 6981720 in words is "six million, nine hundred eighty-one thousand, seven hundred twenty".