1993791056 has 20 divisors (see below), whose sum is σ = 3869416404. Its totient is φ = 995232000.

The previous prime is 1993791043. The next prime is 1993791073. The reversal of 1993791056 is 6501973991.

It can be written as a sum of positive squares in 2 ways, for example, as 1839037456 + 154753600 = 42884^2 + 12440^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1993790995 and 1993791013.

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 3 ways as a sum of consecutive naturals, for example, 94055 + ... + 113286.

Almost surely, 2^1993791056 is an apocalyptic number.

1993791056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1993791056 is a deficient number, since it is larger than the sum of its proper divisors (1875625348).

1993791056 is a wasteful number, since it uses less digits than its factorization.

1993791056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207950 (or 207944 counting only the distinct ones).

The product of its (nonzero) digits is 459270, while the sum is 50.

The square root of 1993791056 is about 44651.8874853012. The cubic root of 1993791056 is about 1258.6159018226.

The spelling of 1993791056 in words is "one billion, nine hundred ninety-three million, seven hundred ninety-one thousand, fifty-six".