7220712 has 64 divisors (see below), whose sum is σ = 19169280. Its totient is φ = 2261952.

The previous prime is 7220711. The next prime is 7220713. The reversal of 7220712 is 2170227.

It is an interprime number because it is at equal distance from previous prime (7220711) and next prime (7220713).

It is not an unprimeable number, because it can be changed into a prime (7220711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56793 + ... + 56919.

It is an arithmetic number, because the mean of its divisors is an integer number (299520).

Almost surely, 2^7220712 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 7220712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9584640).

7220712 is an abundant number, since it is smaller than the sum of its proper divisors (11948568).

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

7220712 is a wasteful number, since it uses less digits than its factorization.

7220712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 7220712 is about 2687.1382547238. The cubic root of 7220712 is about 193.2828590657.

Adding to 7220712 its reverse (2170227), we get a palindrome (9390939).

The spelling of 7220712 in words is "seven million, two hundred twenty thousand, seven hundred twelve".