1304321312 has 48 divisors (see below), whose sum is σ = 2937477312. Its totient is φ = 558470400.

The previous prime is 1304321309. The next prime is 1304321323. The reversal of 1304321312 is 2131234031.

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, 323018 + ... + 327030.

It is an arithmetic number, because the mean of its divisors is an integer number (61197444).

Almost surely, 2^1304321312 is an apocalyptic number.

It is an amenable number.

1304321312 is an abundant number, since it is smaller than the sum of its proper divisors (1633156000).

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

1304321312 is a wasteful number, since it uses less digits than its factorization.

1304321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5481 (or 5473 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1304321312 is about 36115.3888529530. The cubic root of 1304321312 is about 1092.6008402539.

Adding to 1304321312 its reverse (2131234031), we get a palindrome (3435555343).

The spelling of 1304321312 in words is "one billion, three hundred four million, three hundred twenty-one thousand, three hundred twelve".