309304704 has 64 divisors (see below), whose sum is σ = 825355440. Its totient is φ = 102629376.

The previous prime is 309304693. The next prime is 309304717. The reversal of 309304704 is 407403903.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87744 + ... + 91200.

Almost surely, 2^309304704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309304704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412677720).

309304704 is an abundant number, since it is smaller than the sum of its proper divisors (516050736).

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

309304704 is a wasteful number, since it uses less digits than its factorization.

309304704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707 (or 3695 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 309304704 is about 17587.0606981383. The cubic root of 309304704 is about 676.2835779068.

The spelling of 309304704 in words is "three hundred nine million, three hundred four thousand, seven hundred four".