1983811904 has 14 divisors (see below), whose sum is σ = 3936626874. Its totient is φ = 991905920.

The previous prime is 1983811901. The next prime is 1983811909. The reversal of 1983811904 is 4091183891.

It can be written as a sum of positive squares in only one way, i.e., 1417371904 + 566440000 = 37648^2 + 23800^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983811901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15498467 + ... + 15498594.

Almost surely, 2^1983811904 is an apocalyptic number.

It is an amenable number.

1983811904 is a deficient number, since it is larger than the sum of its proper divisors (1952814970).

1983811904 is an equidigital number, since it uses as much as digits as its factorization.

1983811904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30997073 (or 30997063 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 1983811904 is about 44540.0034126626. The cubic root of 1983811904 is about 1256.5125499479.

The spelling of 1983811904 in words is "one billion, nine hundred eighty-three million, eight hundred eleven thousand, nine hundred four".