7428228 has 12 divisors (see below), whose sum is σ = 17332560. Its totient is φ = 2476072.

The previous prime is 7428227. The next prime is 7428271. The reversal of 7428228 is 8228247.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (7428227) 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, 309498 + ... + 309521.

It is an arithmetic number, because the mean of its divisors is an integer number (1444380).

Almost surely, 2^7428228 is an apocalyptic number.

It is an amenable number.

7428228 is an abundant number, since it is smaller than the sum of its proper divisors (9904332).

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

7428228 is a wasteful number, since it uses less digits than its factorization.

7428228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619026 (or 619024 counting only the distinct ones).

The product of its digits is 14336, while the sum is 33.

The square root of 7428228 is about 2725.4775728301. The cubic root of 7428228 is about 195.1169843741.

The spelling of 7428228 in words is "seven million, four hundred twenty-eight thousand, two hundred twenty-eight".