309220704 has 72 divisors (see below), whose sum is σ = 946999872. Its totient is φ = 95143680.

The previous prime is 309220679. The next prime is 309220721. The reversal of 309220704 is 407022903.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 37552 + ... + 45039.

It is an arithmetic number, because the mean of its divisors is an integer number (13152776).

Almost surely, 2^309220704 is an apocalyptic number.

It is an amenable number.

309220704 is an abundant number, since it is smaller than the sum of its proper divisors (637779168).

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

309220704 is a wasteful number, since it uses less digits than its factorization.

309220704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82620 (or 82609 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 309220704 is about 17584.6724166247. The cubic root of 309220704 is about 676.2223513740. Note that the first 3 decimals are identical.

The spelling of 309220704 in words is "three hundred nine million, two hundred twenty thousand, seven hundred four".