11983538 has 24 divisors (see below), whose sum is σ = 22143132. Its totient is φ = 4833024.

The previous prime is 11983519. The next prime is 11983561. The reversal of 11983538 is 83538911.

It can be written as a sum of positive squares in 2 ways, for example, as 11812969 + 170569 = 3437^2 + 413^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1931 + ... + 5262.

Almost surely, 2^11983538 is an apocalyptic number.

11983538 is a deficient number, since it is larger than the sum of its proper divisors (10159594).

11983538 is a wasteful number, since it uses less digits than its factorization.

11983538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7226 (or 7219 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 11983538 is about 3461.7247146473. The cubic root of 11983538 is about 228.8381101245.

It can be divided in two parts, 11983 and 538, that added together give a palindrome (12521).

The spelling of 11983538 in words is "eleven million, nine hundred eighty-three thousand, five hundred thirty-eight".