1304051320 has 256 divisors, whose sum is σ = 3701376000. Its totient is φ = 408844800.

The previous prime is 1304051303. The next prime is 1304051327. The reversal of 1304051320 is 231504031.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304051327) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18366885 + ... + 18366955.

It is an arithmetic number, because the mean of its divisors is an integer number (14458500).

Almost surely, 2^1304051320 is an apocalyptic number.

1304051320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1304051320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1850688000).

1304051320 is an abundant number, since it is smaller than the sum of its proper divisors (2397324680).

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

1304051320 is a wasteful number, since it uses less digits than its factorization.

1304051320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1304051320 is about 36111.6507515234. The cubic root of 1304051320 is about 1092.5254462948.

Adding to 1304051320 its reverse (231504031), we get a palindrome (1535555351).

The spelling of 1304051320 in words is "one billion, three hundred four million, fifty-one thousand, three hundred twenty".