6897720 has 64 divisors (see below), whose sum is σ = 21150720. Its totient is φ = 1798784.

The previous prime is 6897719. The next prime is 6897739. The reversal of 6897720 is 277986.

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, 5029 + ... + 6251.

It is an arithmetic number, because the mean of its divisors is an integer number (330480).

Almost surely, 2^6897720 is an apocalyptic number.

6897720 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 6897720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10575360).

6897720 is an abundant number, since it is smaller than the sum of its proper divisors (14253000).

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

6897720 is a wasteful number, since it uses less digits than its factorization.

6897720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 6897720 is about 2626.3510808725. The cubic root of 6897720 is about 190.3568547344.

The spelling of 6897720 in words is "six million, eight hundred ninety-seven thousand, seven hundred twenty".