1982320538 has 16 divisors (see below), whose sum is σ = 3296976480. Its totient is φ = 886282800.

The previous prime is 1982320537. The next prime is 1982320553. The reversal of 1982320538 is 8350232891.

It is a junction number, because it is equal to n+sod(n) for n = 1982320495 and 1982320504.

It is not an unprimeable number, because it can be changed into a prime (1982320537) 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 7 ways as a sum of consecutive naturals, for example, 737228 + ... + 739911.

It is an arithmetic number, because the mean of its divisors is an integer number (206061030).

Almost surely, 2^1982320538 is an apocalyptic number.

1982320538 is a deficient number, since it is larger than the sum of its proper divisors (1314655942).

1982320538 is a wasteful number, since it uses less digits than its factorization.

1982320538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477213.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1982320538 is about 44523.2583937878. The cubic root of 1982320538 is about 1256.1976024349.

The spelling of 1982320538 in words is "one billion, nine hundred eighty-two million, three hundred twenty thousand, five hundred thirty-eight".