7221088 has 24 divisors (see below), whose sum is σ = 16247952. Its totient is φ = 3094656.

The previous prime is 7221079. The next prime is 7221089. The reversal of 7221088 is 8801227.

It is a super-2 number, since 2×7221088² = 104288223807488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15895 + ... + 16342.

It is an arithmetic number, because the mean of its divisors is an integer number (676998).

Almost surely, 2^7221088 is an apocalyptic number.

It is an amenable number.

7221088 is an abundant number, since it is smaller than the sum of its proper divisors (9026864).

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

7221088 is a wasteful number, since it uses less digits than its factorization.

7221088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32254 (or 32246 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 7221088 is about 2687.2082167186. The cubic root of 7221088 is about 193.2862139100.

The spelling of 7221088 in words is "seven million, two hundred twenty-one thousand, eighty-eight".