1993786312 has 16 divisors (see below), whose sum is σ = 4272399360. Its totient is φ = 854479824.

The previous prime is 1993786283. The next prime is 1993786313. The reversal of 1993786312 is 2136873991.

It is a super-2 number, since 2×1993786312² = 7950367715837122688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1993786313) by changing a digit.

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, 17801608 + ... + 17801719.

It is an arithmetic number, because the mean of its divisors is an integer number (267024960).

Almost surely, 2^1993786312 is an apocalyptic number.

It is an amenable number.

1993786312 is an abundant number, since it is smaller than the sum of its proper divisors (2278613048).

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

1993786312 is a wasteful number, since it uses less digits than its factorization.

1993786312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35603340 (or 35603336 counting only the distinct ones).

The product of its digits is 489888, while the sum is 49.

The square root of 1993786312 is about 44651.8343632151. The cubic root of 1993786312 is about 1258.6149035771.

The spelling of 1993786312 in words is "one billion, nine hundred ninety-three million, seven hundred eighty-six thousand, three hundred twelve".