1983993984 has 384 divisors, whose sum is σ = 7179494400. Its totient is φ = 512759808.

The previous prime is 1983993971. The next prime is 1983994021. The reversal of 1983993984 is 4893993891.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3523687 + ... + 3524249.

It is an arithmetic number, because the mean of its divisors is an integer number (18696600).

Almost surely, 2^1983993984 is an apocalyptic number.

1983993984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1983993984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3589747200).

1983993984 is an abundant number, since it is smaller than the sum of its proper divisors (5195500416).

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

1983993984 is a wasteful number, since it uses less digits than its factorization.

1983993984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 617 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 63.

The square root of 1983993984 is about 44542.0473709954. The cubic root of 1983993984 is about 1256.5509908917.

The spelling of 1983993984 in words is "one billion, nine hundred eighty-three million, nine hundred ninety-three thousand, nine hundred eighty-four".