1308451968 has 384 divisors, whose sum is σ = 4277145600. Its totient is φ = 396887040.

The previous prime is 1308451933. The next prime is 1308451981. The reversal of 1308451968 is 8691548031.

1308451968 is a `hidden beast` number, since 130 + 8 + 451 + 9 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22177123 + ... + 22177181.

It is an arithmetic number, because the mean of its divisors is an integer number (11138400).

Almost surely, 2^1308451968 is an apocalyptic number.

1308451968 is a gapful number since it is divisible by the number (18) 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 1308451968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2138572800).

1308451968 is an abundant number, since it is smaller than the sum of its proper divisors (2968693632).

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

1308451968 is an equidigital number, since it uses as much as digits as its factorization.

1308451968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1308451968 is about 36172.5305722450. The cubic root of 1308451968 is about 1093.7530109392.

Adding to 1308451968 its reverse (8691548031), we get a palindrome (9999999999).

The spelling of 1308451968 in words is "one billion, three hundred eight million, four hundred fifty-one thousand, nine hundred sixty-eight".