1299317328 has 160 divisors (see below), whose sum is σ = 3817672320. Its totient is φ = 423014400.

The previous prime is 1299317323. The next prime is 1299317329. The reversal of 1299317328 is 8237139921.

1299317328 is a `hidden beast` number, since 1 + 2 + 9 + 9 + 317 + 328 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299317321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4232151 + ... + 4232457.

It is an arithmetic number, because the mean of its divisors is an integer number (23860452).

Almost surely, 2^1299317328 is an apocalyptic number.

1299317328 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 1299317328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1908836160).

1299317328 is an abundant number, since it is smaller than the sum of its proper divisors (2518354992).

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

1299317328 is a wasteful number, since it uses less digits than its factorization.

1299317328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 510 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 1299317328 is about 36046.0445541532. The cubic root of 1299317328 is about 1091.2018077228.

The spelling of 1299317328 in words is "one billion, two hundred ninety-nine million, three hundred seventeen thousand, three hundred twenty-eight".