7223720 has 32 divisors (see below), whose sum is σ = 18576000. Its totient is φ = 2476608.

The previous prime is 7223719. The next prime is 7223729. The reversal of 7223720 is 273227.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7223729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12620 + ... + 13179.

It is an arithmetic number, because the mean of its divisors is an integer number (580500).

Almost surely, 2^7223720 is an apocalyptic number.

7223720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7223720 is an abundant number, since it is smaller than the sum of its proper divisors (11352280).

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

7223720 is a wasteful number, since it uses less digits than its factorization.

7223720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25817 (or 25813 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 7223720 is about 2687.6978996904. The cubic root of 7223720 is about 193.3096945599.

Adding to 7223720 its reverse (273227), we get a palindrome (7496947).

The spelling of 7223720 in words is "seven million, two hundred twenty-three thousand, seven hundred twenty".