1982115844 has 6 divisors (see below), whose sum is σ = 3468702734. Its totient is φ = 991057920.

The previous prime is 1982115787. The next prime is 1982115847. The reversal of 1982115844 is 4485112891.

It can be written as a sum of positive squares in only one way, i.e., 1124797444 + 857318400 = 33538^2 + 29280^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1982115844.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247764477 + ... + 247764484.

Almost surely, 2^1982115844 is an apocalyptic number.

It is an amenable number.

1982115844 is a deficient number, since it is larger than the sum of its proper divisors (1486586890).

1982115844 is a wasteful number, since it uses less digits than its factorization.

1982115844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495528965 (or 495528963 counting only the distinct ones).

The product of its digits is 92160, while the sum is 43.

The square root of 1982115844 is about 44520.9596033149. The cubic root of 1982115844 is about 1256.1543627135.

The spelling of 1982115844 in words is "one billion, nine hundred eighty-two million, one hundred fifteen thousand, eight hundred forty-four".