1304020312 has 64 divisors (see below), whose sum is σ = 2947104000. Its totient is φ = 528425856.

The previous prime is 1304020307. The next prime is 1304020327. The reversal of 1304020312 is 2130204031.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804639 + ... + 806257.

It is an arithmetic number, because the mean of its divisors is an integer number (46048500).

Almost surely, 2^1304020312 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 1304020312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473552000).

1304020312 is an abundant number, since it is smaller than the sum of its proper divisors (1643083688).

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

1304020312 is a wasteful number, since it uses less digits than its factorization.

1304020312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2404 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1304020312 is about 36111.2214138486. The cubic root of 1304020312 is about 1092.5167867948.

Adding to 1304020312 its reverse (2130204031), we get a palindrome (3434224343).

The spelling of 1304020312 in words is "one billion, three hundred four million, twenty thousand, three hundred twelve".