1320309408 has 96 divisors (see below), whose sum is σ = 3812501952. Its totient is φ = 400055040.

The previous prime is 1320309379. The next prime is 1320309427. The reversal of 1320309408 is 8049030231.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122610 + ... + 132942.

It is an arithmetic number, because the mean of its divisors is an integer number (39713562).

Almost surely, 2^1320309408 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 1320309408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1906250976).

1320309408 is an abundant number, since it is smaller than the sum of its proper divisors (2492192544).

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

1320309408 is a wasteful number, since it uses less digits than its factorization.

1320309408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10379 (or 10349 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1320309408 is about 36336.0620871332. The cubic root of 1320309408 is about 1097.0470130344.

Adding to 1320309408 its reverse (8049030231), we get a palindrome (9369339639).

The spelling of 1320309408 in words is "one billion, three hundred twenty million, three hundred nine thousand, four hundred eight".