1983799920 has 40 divisors (see below), whose sum is σ = 6149780496. Its totient is φ = 529013248.

The previous prime is 1983799919. The next prime is 1983799931. The reversal of 1983799920 is 299973891.

1983799920 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent 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, 4132677 + ... + 4133156.

Almost surely, 2^1983799920 is an apocalyptic number.

1983799920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1983799920 is an abundant number, since it is smaller than the sum of its proper divisors (4165980576).

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

1983799920 is a wasteful number, since it uses less digits than its factorization.

1983799920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8265849 (or 8265843 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 1983799920 is about 44539.8688817109. The cubic root of 1983799920 is about 1256.5100197892.

The spelling of 1983799920 in words is "one billion, nine hundred eighty-three million, seven hundred ninety-nine thousand, nine hundred twenty".