309224228 has 6 divisors (see below), whose sum is σ = 541142406. Its totient is φ = 154612112.

The previous prime is 309224177. The next prime is 309224243. The reversal of 309224228 is 822422903.

It can be written as a sum of positive squares in only one way, i.e., 308986084 + 238144 = 17578^2 + 488^2 .

It is a junction number, because it is equal to n+sod(n) for n = 309224194 and 309224203.

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 as a sum of consecutive naturals, namely, 38653025 + ... + 38653032.

It is an arithmetic number, because the mean of its divisors is an integer number (90190401).

Almost surely, 2^309224228 is an apocalyptic number.

It is an amenable number.

309224228 is a deficient number, since it is larger than the sum of its proper divisors (231918178).

309224228 is a wasteful number, since it uses less digits than its factorization.

309224228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77306061 (or 77306059 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 309224228 is about 17584.7726172390. The cubic root of 309224228 is about 676.2249201956.

The spelling of 309224228 in words is "three hundred nine million, two hundred twenty-four thousand, two hundred twenty-eight".