1987493768 has 32 divisors (see below), whose sum is σ = 4052193600. Its totient is φ = 908394048.

The previous prime is 1987493759. The next prime is 1987493773. The reversal of 1987493768 is 8673947891.

It is a self number, because there is not a number n which added to its sum of digits gives 1987493768.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82058 + ... + 103481.

It is an arithmetic number, because the mean of its divisors is an integer number (126631050).

Almost surely, 2^1987493768 is an apocalyptic number.

It is an amenable number.

1987493768 is an abundant number, since it is smaller than the sum of its proper divisors (2064699832).

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

1987493768 is a wasteful number, since it uses less digits than its factorization.

1987493768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185661 (or 185657 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 62.

The square root of 1987493768 is about 44581.3163556214. The cubic root of 1987493768 is about 1257.2894127793.

The spelling of 1987493768 in words is "one billion, nine hundred eighty-seven million, four hundred ninety-three thousand, seven hundred sixty-eight".