1909998984 has 16 divisors (see below), whose sum is σ = 4774997520. Its totient is φ = 636666320.

The previous prime is 1909998973. The next prime is 1909998989. The reversal of 1909998984 is 4898999091.

It is a super-2 number, since 2×1909998984² = 7296192237762064512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1909998989) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 39791622 + ... + 39791669.

It is an arithmetic number, because the mean of its divisors is an integer number (298437345).

Almost surely, 2^1909998984 is an apocalyptic number.

It is an amenable number.

1909998984 is an abundant number, since it is smaller than the sum of its proper divisors (2864998536).

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

1909998984 is a wasteful number, since it uses less digits than its factorization.

1909998984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79583300 (or 79583296 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 66.

The square root of 1909998984 is about 43703.5351430522. The cubic root of 1909998984 is about 1240.7312249745.

The spelling of 1909998984 in words is "one billion, nine hundred nine million, nine hundred ninety-eight thousand, nine hundred eighty-four".