7222788 has 36 divisors (see below), whose sum is σ = 18344508. Its totient is φ = 2396160.

The previous prime is 7222781. The next prime is 7222799. The reversal of 7222788 is 8872227.

It can be written as a sum of positive squares in 2 ways, for example, as 2762244 + 4460544 = 1662^2 + 2112^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (7222781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10948 + ... + 11588.

Almost surely, 2^7222788 is an apocalyptic number.

It is an amenable number.

7222788 is an abundant number, since it is smaller than the sum of its proper divisors (11121720).

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

7222788 is a wasteful number, since it uses less digits than its factorization.

7222788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 959 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 7222788 is about 2687.5245115161. The cubic root of 7222788 is about 193.3013806356.

The spelling of 7222788 in words is "seven million, two hundred twenty-two thousand, seven hundred eighty-eight".