7220016 has 70 divisors (see below), whose sum is σ = 21007460. Its totient is φ = 2402784.

The previous prime is 7219997. The next prime is 7220027. The reversal of 7220016 is 6100227.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 11355 + ... + 11973.

Almost surely, 2^7220016 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 7220016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10503730).

7220016 is an abundant number, since it is smaller than the sum of its proper divisors (13787444).

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

7220016 is an equidigital number, since it uses as much as digits as its factorization.

7220016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 7220016 is about 2687.0087457989. The cubic root of 7220016 is about 193.2766487274.

The spelling of 7220016 in words is "seven million, two hundred twenty thousand, sixteen".