1299479328 has 384 divisors, whose sum is σ = 4644864000. Its totient is φ = 345461760.

The previous prime is 1299479317. The next prime is 1299479341. The reversal of 1299479328 is 8239749921.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5437033 + ... + 5437271.

It is an arithmetic number, because the mean of its divisors is an integer number (12096000).

Almost surely, 2^1299479328 is an apocalyptic number.

1299479328 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 1299479328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2322432000).

1299479328 is an abundant number, since it is smaller than the sum of its proper divisors (3345384672).

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

1299479328 is a wasteful number, since it uses less digits than its factorization.

1299479328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 311 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 1299479328 is about 36048.2916100056. The cubic root of 1299479328 is about 1091.2471564976.

The spelling of 1299479328 in words is "one billion, two hundred ninety-nine million, four hundred seventy-nine thousand, three hundred twenty-eight".