1320328408 has 64 divisors (see below), whose sum is σ = 2887315200. Its totient is φ = 554325120.

The previous prime is 1320328403. The next prime is 1320328423. The reversal of 1320328408 is 8048230231.

It is a self number, because there is not a number n which added to its sum of digits gives 1320328408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320328403) 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, 1048083 + ... + 1049341.

It is an arithmetic number, because the mean of its divisors is an integer number (45114300).

Almost surely, 2^1320328408 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 1320328408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1443657600).

1320328408 is an abundant number, since it is smaller than the sum of its proper divisors (1566986792).

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

1320328408 is a wasteful number, since it uses less digits than its factorization.

1320328408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1636 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 1320328408 is about 36336.3235344469. The cubic root of 1320328408 is about 1097.0522753850.

Adding to 1320328408 its reverse (8048230231), we get a palindrome (9368558639).

The spelling of 1320328408 in words is "one billion, three hundred twenty million, three hundred twenty-eight thousand, four hundred eight".