1989992796 has 48 divisors (see below), whose sum is σ = 5228848128. Its totient is φ = 583574400.

The previous prime is 1989992779. The next prime is 1989992819. The reversal of 1989992796 is 6972999891.

It is a self number, because there is not a number n which added to its sum of digits gives 1989992796.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239065 + ... + 247248.

It is an arithmetic number, because the mean of its divisors is an integer number (108934336).

Almost surely, 2^1989992796 is an apocalyptic number.

It is an amenable number.

1989992796 is an abundant number, since it is smaller than the sum of its proper divisors (3238855332).

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

1989992796 is a wasteful number, since it uses less digits than its factorization.

1989992796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486362 (or 486360 counting only the distinct ones).

The product of its digits is 39680928, while the sum is 69.

The square root of 1989992796 is about 44609.3353010331. The cubic root of 1989992796 is about 1257.8161541329.

The spelling of 1989992796 in words is "one billion, nine hundred eighty-nine million, nine hundred ninety-two thousand, seven hundred ninety-six".