1004320320 has 112 divisors (see below), whose sum is σ = 3249046080. Its totient is φ = 262752256.

The previous prime is 1004320313. The next prime is 1004320321. The reversal of 1004320320 is 230234001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1004320320.

It is not an unprimeable number, because it can be changed into a prime (1004320321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41011 + ... + 60749.

It is an arithmetic number, because the mean of its divisors is an integer number (29009340).

Almost surely, 2^1004320320 is an apocalyptic number.

1004320320 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 1004320320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1624523040).

1004320320 is an abundant number, since it is smaller than the sum of its proper divisors (2244725760).

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

1004320320 is a wasteful number, since it uses less digits than its factorization.

1004320320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19812 (or 19802 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1004320320 is about 31691.0132371939. The cubic root of 1004320320 is about 1001.4380377229.

Adding to 1004320320 its reverse (230234001), we get a palindrome (1234554321).

The spelling of 1004320320 in words is "one billion, four million, three hundred twenty thousand, three hundred twenty".