1982287139808 has 24 divisors (see below), whose sum is σ = 5203503742248. Its totient is φ = 660762379904.

The previous prime is 1982287139801. The next prime is 1982287139821. The reversal of 1982287139808 is 8089317822891.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982287139801) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10324412091 + ... + 10324412282.

It is an arithmetic number, because the mean of its divisors is an integer number (216812655927).

Almost surely, 2^{1982287139808} is an apocalyptic number.

It is an amenable number.

1982287139808 is an abundant number, since it is smaller than the sum of its proper divisors (3221216602440).

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

1982287139808 is a wasteful number, since it uses less digits than its factorization.

1982287139808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20648824386 (or 20648824378 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 66.

The spelling of 1982287139808 in words is "one trillion, nine hundred eighty-two billion, two hundred eighty-seven million, one hundred thirty-nine thousand, eight hundred eight".