7191228 has 48 divisors (see below), whose sum is σ = 18474624. Its totient is φ = 2159040.

The previous prime is 7191211. The next prime is 7191241. The reversal of 7191228 is 8221917.

It is a junction number, because it is equal to n+sod(n) for n = 7191195 and 7191204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20551 + ... + 20897.

It is an arithmetic number, because the mean of its divisors is an integer number (384888).

Almost surely, 2^7191228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7191228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9237312).

7191228 is an abundant number, since it is smaller than the sum of its proper divisors (11283396).

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

7191228 is a wasteful number, since it uses less digits than its factorization.

7191228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 520 counting only the distinct ones).

The product of its digits is 2016, while the sum is 30.

The square root of 7191228 is about 2681.6465091432. The cubic root of 7191228 is about 193.0194258593.

The spelling of 7191228 in words is "seven million, one hundred ninety-one thousand, two hundred twenty-eight".