1982236538 has 8 divisors (see below), whose sum is σ = 2974101300. Its totient is φ = 990869440.

The previous prime is 1982236537. The next prime is 1982236547. The reversal of 1982236538 is 8356322891.

It can be written as a sum of positive squares in 2 ways, for example, as 1555276969 + 426959569 = 39437^2 + 20663^2 .

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

It is a super-3 number, since 3×1982236538³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1982236492 and 1982236501.

It is not an unprimeable number, because it can be changed into a prime (1982236537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114293 + ... + 130488.

Almost surely, 2^1982236538 is an apocalyptic number.

1982236538 is a deficient number, since it is larger than the sum of its proper divisors (991864762).

1982236538 is a wasteful number, since it uses less digits than its factorization.

1982236538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248832.

The product of its digits is 622080, while the sum is 47.

The square root of 1982236538 is about 44522.3150566095. The cubic root of 1982236538 is about 1256.1798585691.

The spelling of 1982236538 in words is "one billion, nine hundred eighty-two million, two hundred thirty-six thousand, five hundred thirty-eight".