1298387808 has 36 divisors (see below), whose sum is σ = 3692291148. Its totient is φ = 432795840.

The previous prime is 1298387791. The next prime is 1298387809. The reversal of 1298387808 is 8087838921.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298387809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2253858 + ... + 2254433.

It is an arithmetic number, because the mean of its divisors is an integer number (102563643).

Almost surely, 2^1298387808 is an apocalyptic number.

1298387808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1298387808 is an abundant number, since it is smaller than the sum of its proper divisors (2393903340).

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

1298387808 is a wasteful number, since it uses less digits than its factorization.

1298387808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508307 (or 4508296 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The square root of 1298387808 is about 36033.1487383492. The cubic root of 1298387808 is about 1090.9415336412.

The spelling of 1298387808 in words is "one billion, two hundred ninety-eight million, three hundred eighty-seven thousand, eight hundred eight".