7181228 has 6 divisors (see below), whose sum is σ = 12567156. Its totient is φ = 3590612.

The previous prime is 7181227. The next prime is 7181231. The reversal of 7181228 is 8221817.

It is a self number, because there is not a number n which added to its sum of digits gives 7181228.

It is not an unprimeable number, because it can be changed into a prime (7181227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 897650 + ... + 897657.

It is an arithmetic number, because the mean of its divisors is an integer number (2094526).

Almost surely, 2^7181228 is an apocalyptic number.

It is an amenable number.

7181228 is a deficient number, since it is larger than the sum of its proper divisors (5385928).

7181228 is a wasteful number, since it uses less digits than its factorization.

7181228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795311 (or 1795309 counting only the distinct ones).

The product of its digits is 1792, while the sum is 29.

The square root of 7181228 is about 2679.7813343629. The cubic root of 7181228 is about 192.9299145061.

The spelling of 7181228 in words is "seven million, one hundred eighty-one thousand, two hundred twenty-eight".