1298085888 has 96 divisors (see below), whose sum is σ = 3775524480. Its totient is φ = 393338880.

The previous prime is 1298085869. The next prime is 1298085931. The reversal of 1298085888 is 8885808921.

It is a tau number, because it is divible by the number of its divisors (96).

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 7 ways as a sum of consecutive naturals, for example, 57981 + ... + 77187.

It is an arithmetic number, because the mean of its divisors is an integer number (39328380).

Almost surely, 2^1298085888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298085888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1887762240).

1298085888 is an abundant number, since it is smaller than the sum of its proper divisors (2477438592).

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

1298085888 is a wasteful number, since it uses less digits than its factorization.

1298085888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19243 (or 19223 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 57.

The square root of 1298085888 is about 36028.9590191002. The cubic root of 1298085888 is about 1090.8569665600.

The spelling of 1298085888 in words is "one billion, two hundred ninety-eight million, eighty-five thousand, eight hundred eighty-eight".