7447216 has 80 divisors (see below), whose sum is σ = 17856000. Its totient is φ = 3001152.

The previous prime is 7447211. The next prime is 7447217. The reversal of 7447216 is 6127447.

It is a super-2 number, since 2×7447216² = 110922052301312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7447211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126195 + ... + 126253.

It is an arithmetic number, because the mean of its divisors is an integer number (223200).

Almost surely, 2^7447216 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 7447216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8928000).

7447216 is an abundant number, since it is smaller than the sum of its proper divisors (10408784).

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

7447216 is a wasteful number, since it uses less digits than its factorization.

7447216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 91 counting only the distinct ones).

The product of its digits is 9408, while the sum is 31.

The square root of 7447216 is about 2728.9587757971. The cubic root of 7447216 is about 195.2830952767.

The spelling of 7447216 in words is "seven million, four hundred forty-seven thousand, two hundred sixteen".