1317990984 has 32 divisors (see below), whose sum is σ = 3296160000. Its totient is φ = 439172672.

The previous prime is 1317990959. The next prime is 1317991019. The reversal of 1317990984 is 4890997131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72442 + ... + 88790.

It is an arithmetic number, because the mean of its divisors is an integer number (103005000).

Almost surely, 2^1317990984 is an apocalyptic number.

It is an amenable number.

1317990984 is an abundant number, since it is smaller than the sum of its proper divisors (1978169016).

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

1317990984 is a wasteful number, since it uses less digits than its factorization.

1317990984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19717 (or 19713 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 1317990984 is about 36304.1455484081. The cubic root of 1317990984 is about 1096.4045095207.

The spelling of 1317990984 in words is "one billion, three hundred seventeen million, nine hundred ninety thousand, nine hundred eighty-four".