1298809008 has 120 divisors (see below), whose sum is σ = 4224729600. Its totient is φ = 364781952.

The previous prime is 1298809007. The next prime is 1298809013. The reversal of 1298809008 is 8009088921.

It is not an unprimeable number, because it can be changed into a prime (1298809007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48553 + ... + 70391.

It is an arithmetic number, because the mean of its divisors is an integer number (35206080).

Almost surely, 2^1298809008 is an apocalyptic number.

1298809008 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 1298809008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2112364800).

1298809008 is an abundant number, since it is smaller than the sum of its proper divisors (2925920592).

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

1298809008 is a wasteful number, since it uses less digits than its factorization.

1298809008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21919 (or 21910 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 1298809008 is about 36038.9928827097. The cubic root of 1298809008 is about 1091.0594888705.

The spelling of 1298809008 in words is "one billion, two hundred ninety-eight million, eight hundred nine thousand, eight".