1299879360 has 448 divisors, whose sum is σ = 5038709760. Its totient is φ = 313528320.

The previous prime is 1299879359. The next prime is 1299879389. The reversal of 1299879360 is 639789921.

1299879360 is a `hidden beast` number, since 129 + 98 + 79 + 360 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1299879297 and 1299879306.

It is a congruent number.

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, 7974639 + ... + 7974801.

It is an arithmetic number, because the mean of its divisors is an integer number (11247120).

Almost surely, 2^1299879360 is an apocalyptic number.

1299879360 is a gapful number since it is divisible by the number (10) 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 1299879360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2519354880).

1299879360 is an abundant number, since it is smaller than the sum of its proper divisors (3738830400).

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

1299879360 is a wasteful number, since it uses less digits than its factorization.

1299879360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 1299879360 is about 36053.8397400332. The cubic root of 1299879360 is about 1091.3591215969.

The spelling of 1299879360 in words is "one billion, two hundred ninety-nine million, eight hundred seventy-nine thousand, three hundred sixty".