309069028 has 6 divisors (see below), whose sum is σ = 540870806. Its totient is φ = 154534512.

The previous prime is 309069017. The next prime is 309069031. The reversal of 309069028 is 820960903.

It can be written as a sum of positive squares in only one way, i.e., 308986084 + 82944 = 17578^2 + 288^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 38633625 + ... + 38633632.

Almost surely, 2^309069028 is an apocalyptic number.

It is an amenable number.

309069028 is a deficient number, since it is larger than the sum of its proper divisors (231801778).

309069028 is a wasteful number, since it uses less digits than its factorization.

309069028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77267261 (or 77267259 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 309069028 is about 17580.3591544655. The cubic root of 309069028 is about 676.1117685716. Note that the first 3 decimals are identical.

The spelling of 309069028 in words is "three hundred nine million, sixty-nine thousand, twenty-eight".