305731228 has 12 divisors (see below), whose sum is σ = 583668792. Its totient is φ = 138968720.

The previous prime is 305731177. The next prime is 305731243. The reversal of 305731228 is 822137503.

It is a self number, because there is not a number n which added to its sum of digits gives 305731228.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3474175 + ... + 3474262.

It is an arithmetic number, because the mean of its divisors is an integer number (48639066).

Almost surely, 2^305731228 is an apocalyptic number.

It is an amenable number.

305731228 is a deficient number, since it is larger than the sum of its proper divisors (277937564).

305731228 is a wasteful number, since it uses less digits than its factorization.

305731228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6948452 (or 6948450 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 305731228 is about 17485.1716605814. The cubic root of 305731228 is about 673.6690577103.

The spelling of 305731228 in words is "three hundred five million, seven hundred thirty-one thousand, two hundred twenty-eight".