1987120982 has 16 divisors (see below), whose sum is σ = 3716174592. Its totient is φ = 774202920.

The previous prime is 1987120981. The next prime is 1987120991. The reversal of 1987120982 is 2890217891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987120981) 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 7 ways as a sum of consecutive naturals, for example, 6451538 + ... + 6451845.

It is an arithmetic number, because the mean of its divisors is an integer number (232260912).

Almost surely, 2^1987120982 is an apocalyptic number.

1987120982 is a deficient number, since it is larger than the sum of its proper divisors (1729053610).

1987120982 is a wasteful number, since it uses less digits than its factorization.

1987120982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12903403.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 1987120982 is about 44577.1351928318. The cubic root of 1987120982 is about 1257.2107996694.

The spelling of 1987120982 in words is "one billion, nine hundred eighty-seven million, one hundred twenty thousand, nine hundred eighty-two".