1987009968 has 40 divisors (see below), whose sum is σ = 5403275200. Its totient is φ = 627476544.

The previous prime is 1987009931. The next prime is 1987009991. The reversal of 1987009968 is 8699007891.

It is a super-2 number, since 2×1987009968² = 7896417225862722048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 1088458 + ... + 1090281.

It is an arithmetic number, because the mean of its divisors is an integer number (135081880).

Almost surely, 2^1987009968 is an apocalyptic number.

It is an amenable number.

1987009968 is an abundant number, since it is smaller than the sum of its proper divisors (3416265232).

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

1987009968 is a wasteful number, since it uses less digits than its factorization.

1987009968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178769 (or 2178763 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 57.

The square root of 1987009968 is about 44575.8899855067. The cubic root of 1987009968 is about 1257.1873871377.

The spelling of 1987009968 in words is "one billion, nine hundred eighty-seven million, nine thousand, nine hundred sixty-eight".