6917220 has 72 divisors (see below), whose sum is σ = 21280896. Its totient is φ = 1818432.

The previous prime is 6917201. The next prime is 6917221. The reversal of 6917220 is 227196.

It is not an unprimeable number, because it can be changed into a prime (6917221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14709 + ... + 15171.

It is an arithmetic number, because the mean of its divisors is an integer number (295568).

Almost surely, 2^6917220 is an apocalyptic number.

6917220 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 6917220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10640448).

6917220 is an abundant number, since it is smaller than the sum of its proper divisors (14363676).

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

6917220 is a wasteful number, since it uses less digits than its factorization.

6917220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 6917220 is about 2630.0608357983. The cubic root of 6917220 is about 190.5360669099.

The spelling of 6917220 in words is "six million, nine hundred seventeen thousand, two hundred twenty".