7217872 has 20 divisors (see below), whose sum is σ = 14721280. Its totient is φ = 3418848.

The previous prime is 7217863. The next prime is 7217887. The reversal of 7217872 is 2787127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11568 + ... + 12175.

It is an arithmetic number, because the mean of its divisors is an integer number (736064).

Almost surely, 2^7217872 is an apocalyptic number.

It is an amenable number.

7217872 is an abundant number, since it is smaller than the sum of its proper divisors (7503408).

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

7217872 is a wasteful number, since it uses less digits than its factorization.

7217872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23770 (or 23764 counting only the distinct ones).

The product of its digits is 10976, while the sum is 34.

The square root of 7217872 is about 2686.6097595297. The cubic root of 7217872 is about 193.2575155215.

The spelling of 7217872 in words is "seven million, two hundred seventeen thousand, eight hundred seventy-two".