1982115843 has 8 divisors (see below), whose sum is σ = 2644678848. Its totient is φ = 1320481704.

The previous prime is 1982115787. The next prime is 1982115847. The reversal of 1982115843 is 3485112891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1982115843 - 2²⁵ = 1948561411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1982115795 and 1982115804.

It is not an unprimeable number, because it can be changed into a prime (1982115847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227221 + ... + 235782.

It is an arithmetic number, because the mean of its divisors is an integer number (330584856).

Almost surely, 2^1982115843 is an apocalyptic number.

1982115843 is a deficient number, since it is larger than the sum of its proper divisors (662563005).

1982115843 is a wasteful number, since it uses less digits than its factorization.

1982115843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464433.

The product of its digits is 69120, while the sum is 42.

The square root of 1982115843 is about 44520.9595920843. The cubic root of 1982115843 is about 1256.1543625023.

The spelling of 1982115843 in words is "one billion, nine hundred eighty-two million, one hundred fifteen thousand, eight hundred forty-three".