309999470 has 32 divisors (see below), whose sum is σ = 622892160. Its totient is φ = 110103840.

The previous prime is 309999467. The next prime is 309999479. The reversal of 309999470 is 74999903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309999479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28040 + ... + 37499.

It is an arithmetic number, because the mean of its divisors is an integer number (19465380).

Almost surely, 2^309999470 is an apocalyptic number.

309999470 is an abundant number, since it is smaller than the sum of its proper divisors (312892690).

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

309999470 is a wasteful number, since it uses less digits than its factorization.

309999470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65600.

The product of its (nonzero) digits is 551124, while the sum is 50.

The square root of 309999470 is about 17606.8018106640. The cubic root of 309999470 is about 676.7895595130.

The spelling of 309999470 in words is "three hundred nine million, nine hundred ninety-nine thousand, four hundred seventy".