225740728 has 24 divisors (see below), whose sum is σ = 427815000. Its totient is φ = 111669504.

The previous prime is 225740707. The next prime is 225740731. The reversal of 225740728 is 827047522.

225740728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73773 + ... + 76771.

It is an arithmetic number, because the mean of its divisors is an integer number (17825625).

Almost surely, 2^225740728 is an apocalyptic number.

It is an amenable number.

225740728 is a deficient number, since it is larger than the sum of its proper divisors (202074272).

225740728 is an equidigital number, since it uses as much as digits as its factorization.

225740728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199 (or 3098 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 225740728 is about 15024.6706453087. The cubic root of 225740728 is about 608.8869139849.

The spelling of 225740728 in words is "two hundred twenty-five million, seven hundred forty thousand, seven hundred twenty-eight".