1298880000 has 600 divisors, whose sum is σ = 5234805576. Its totient is φ = 307200000.

The previous prime is 1298879999. The next prime is 1298880017. The reversal of 1298880000 is 888921.

It is a tau number, because it is divible by the number of its divisors (600).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 59 ways as a sum of consecutive naturals, for example, 31679980 + ... + 31680020.

Almost surely, 2^1298880000 is an apocalyptic number.

1298880000 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 1298880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2617402788).

1298880000 is an abundant number, since it is smaller than the sum of its proper divisors (3935925576).

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

1298880000 is an equidigital number, since it uses as much as digits as its factorization.

1298880000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1298880000 is about 36039.9778024349. The cubic root of 1298880000 is about 1091.0793673601.

The spelling of 1298880000 in words is "one billion, two hundred ninety-eight million, eight hundred eighty thousand".