1984909872 has 80 divisors (see below), whose sum is σ = 5786772480. Its totient is φ = 580742400.

The previous prime is 1984909831. The next prime is 1984909903. The reversal of 1984909872 is 2789094891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49504 + ... + 80127.

It is an arithmetic number, because the mean of its divisors is an integer number (72334656).

Almost surely, 2^1984909872 is an apocalyptic number.

1984909872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1984909872 is an abundant number, since it is smaller than the sum of its proper divisors (3801862608).

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

1984909872 is a wasteful number, since it uses less digits than its factorization.

1984909872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129682 (or 129676 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 57.

The square root of 1984909872 is about 44552.3273466157. The cubic root of 1984909872 is about 1256.7443185824.

The spelling of 1984909872 in words is "one billion, nine hundred eighty-four million, nine hundred nine thousand, eight hundred seventy-two".