309384490 has 16 divisors (see below), whose sum is σ = 557395848. Its totient is φ = 123641856.

The previous prime is 309384463. The next prime is 309384529. The reversal of 309384490 is 94483903.

It can be written as a sum of positive squares in 4 ways, for example, as 224910009 + 84474481 = 14997^2 + 9191^2 .

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 7 ways as a sum of consecutive naturals, for example, 1887 + ... + 24946.

Almost surely, 2^309384490 is an apocalyptic number.

309384490 is a deficient number, since it is larger than the sum of its proper divisors (248011358).

309384490 is a wasteful number, since it uses less digits than its factorization.

309384490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27993.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 309384490 is about 17589.3288672422. The cubic root of 309384490 is about 676.3417226446.

The spelling of 309384490 in words is "three hundred nine million, three hundred eighty-four thousand, four hundred ninety".