309302064 has 240 divisors, whose sum is σ = 974937600. Its totient is φ = 94618368.

The previous prime is 309302047. The next prime is 309302093. The reversal of 309302064 is 460203903.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3915177 + ... + 3915255.

It is an arithmetic number, because the mean of its divisors is an integer number (4062240).

Almost surely, 2^309302064 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 309302064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487468800).

309302064 is an abundant number, since it is smaller than the sum of its proper divisors (665635536).

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

309302064 is a wasteful number, since it uses less digits than its factorization.

309302064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 309302064 is about 17586.9856427985. The cubic root of 309302064 is about 676.2816538131.

Adding to 309302064 its reverse (460203903), we get a palindrome (769505967).

The spelling of 309302064 in words is "three hundred nine million, three hundred two thousand, sixty-four".