1299518080 has 256 divisors, whose sum is σ = 3817704960. Its totient is φ = 412876800.

The previous prime is 1299518071. The next prime is 1299518081. The reversal of 1299518080 is 808159921.

It is not an unprimeable number, because it can be changed into a prime (1299518081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8606005 + ... + 8606155.

It is an arithmetic number, because the mean of its divisors is an integer number (14912910).

Almost surely, 2^1299518080 is an apocalyptic number.

1299518080 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 1299518080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1908852480).

1299518080 is an abundant number, since it is smaller than the sum of its proper divisors (2518186880).

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

1299518080 is a wasteful number, since it uses less digits than its factorization.

1299518080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 1299518080 is about 36048.8291071985. The cubic root of 1299518080 is about 1091.2580038138.

The spelling of 1299518080 in words is "one billion, two hundred ninety-nine million, five hundred eighteen thousand, eighty".