309180228 has 48 divisors (see below), whose sum is σ = 828132480. Its totient is φ = 87945984.

The previous prime is 309180227. The next prime is 309180239. The reversal of 309180228 is 822081903.

It is a super-2 number, since 2×309180228² = 191184826772263968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (309180227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11200 + ... + 27272.

It is an arithmetic number, because the mean of its divisors is an integer number (17252760).

Almost surely, 2^309180228 is an apocalyptic number.

It is an amenable number.

309180228 is an abundant number, since it is smaller than the sum of its proper divisors (518952252).

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

309180228 is a wasteful number, since it uses less digits than its factorization.

309180228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16316 (or 16314 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 309180228 is about 17583.5214903045. The cubic root of 309180228 is about 676.1928449730.

The spelling of 309180228 in words is "three hundred nine million, one hundred eighty thousand, two hundred twenty-eight".