7221760 has 160 divisors (see below), whose sum is σ = 21998592. Its totient is φ = 2211840.

The previous prime is 7221757. The next prime is 7221769. The reversal of 7221760 is 671227.

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (7221769) 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, 232945 + ... + 232975.

Almost surely, 2^7221760 is an apocalyptic number.

7221760 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7221760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10999296).

7221760 is an abundant number, since it is smaller than the sum of its proper divisors (14776832).

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

7221760 is a wasteful number, since it uses less digits than its factorization.

7221760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 7221760 is about 2687.3332506409. Note that the first 3 decimals coincide. The cubic root of 7221760 is about 193.2922095119.

Adding to 7221760 its reverse (671227), we get a palindrome (7892987).

The spelling of 7221760 in words is "seven million, two hundred twenty-one thousand, seven hundred sixty".