1299336768 has 112 divisors (see below), whose sum is σ = 3834749760. Its totient is φ = 431419392.

The previous prime is 1299336751. The next prime is 1299336803. The reversal of 1299336768 is 8676339921.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 487696 + ... + 490352.

Almost surely, 2^1299336768 is an apocalyptic number.

1299336768 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 1299336768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1917374880).

1299336768 is an abundant number, since it is smaller than the sum of its proper divisors (2535412992).

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

1299336768 is a wasteful number, since it uses less digits than its factorization.

1299336768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961 (or 2945 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 1299336768 is about 36046.3142082516. The cubic root of 1299336768 is about 1091.2072497748.

The spelling of 1299336768 in words is "one billion, two hundred ninety-nine million, three hundred thirty-six thousand, seven hundred sixty-eight".