7021228 has 12 divisors (see below), whose sum is σ = 12519360. Its totient is φ = 3444272.

The previous prime is 7021211. The next prime is 7021229. The reversal of 7021228 is 8221207.

It is a junction number, because it is equal to n+sod(n) for n = 7021199 and 7021208.

It is not an unprimeable number, because it can be changed into a prime (7021229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16348 + ... + 16771.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^7021228 is an apocalyptic number.

It is an amenable number.

7021228 is a deficient number, since it is larger than the sum of its proper divisors (5498132).

7021228 is a wasteful number, since it uses less digits than its factorization.

7021228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33176 (or 33174 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 7021228 is about 2649.7599891311. The cubic root of 7021228 is about 191.4862931514.

The spelling of 7021228 in words is "seven million, twenty-one thousand, two hundred twenty-eight".