7220320 has 24 divisors (see below), whose sum is σ = 17058384. Its totient is φ = 2888064.

The previous prime is 7220299. The next prime is 7220347. The reversal of 7220320 is 230227.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 7220294 and 7220303.

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, 22404 + ... + 22723.

It is an arithmetic number, because the mean of its divisors is an integer number (710766).

Almost surely, 2^7220320 is an apocalyptic number.

It is an amenable number.

7220320 is an abundant number, since it is smaller than the sum of its proper divisors (9838064).

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

7220320 is a wasteful number, since it uses less digits than its factorization.

7220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45142 (or 45134 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 7220320 is about 2687.0653136833. The cubic root of 7220320 is about 193.2793613380.

Adding to 7220320 its reverse (230227), we get a palindrome (7450547).

It can be divided in two parts, 7220 and 320, that multiplied together give a square (2310400 = 1520²).

The spelling of 7220320 in words is "seven million, two hundred twenty thousand, three hundred twenty".