1304311220 has 24 divisors (see below), whose sum is σ = 2740303104. Its totient is φ = 521486496.

The previous prime is 1304311207. The next prime is 1304311223. The reversal of 1304311220 is 221134031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304311223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33977 + ... + 61343.

It is an arithmetic number, because the mean of its divisors is an integer number (114179296).

Almost surely, 2^1304311220 is an apocalyptic number.

1304311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304311220 is an abundant number, since it is smaller than the sum of its proper divisors (1435991884).

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

1304311220 is a wasteful number, since it uses less digits than its factorization.

1304311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29759 (or 29757 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1304311220 is about 36115.2491338493. The cubic root of 1304311220 is about 1092.5980222989.

Adding to 1304311220 its reverse (221134031), we get a palindrome (1525445251).

The spelling of 1304311220 in words is "one billion, three hundred four million, three hundred eleven thousand, two hundred twenty".