7407228 has 12 divisors (see below), whose sum is σ = 17283560. Its totient is φ = 2469072.

The previous prime is 7407187. The next prime is 7407229. The reversal of 7407228 is 8227047.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7407195 and 7407204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7407229) 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, 308623 + ... + 308646.

Almost surely, 2^7407228 is an apocalyptic number.

It is an amenable number.

7407228 is an abundant number, since it is smaller than the sum of its proper divisors (9876332).

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

7407228 is a wasteful number, since it uses less digits than its factorization.

7407228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617276 (or 617274 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 7407228 is about 2721.6223103142. The cubic root of 7407228 is about 194.9329420968.

The spelling of 7407228 in words is "seven million, four hundred seven thousand, two hundred twenty-eight".