11938538 has 4 divisors (see below), whose sum is σ = 17907810. Its totient is φ = 5969268.

The previous prime is 11938523. The next prime is 11938543. The reversal of 11938538 is 83583911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83583911 = 443 ⋅188677.

It can be written as a sum of positive squares in only one way, i.e., 9815689 + 2122849 = 3133^2 + 1457^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2984633 + ... + 2984636.

Almost surely, 2^11938538 is an apocalyptic number.

11938538 is a deficient number, since it is larger than the sum of its proper divisors (5969272).

11938538 is an equidigital number, since it uses as much as digits as its factorization.

11938538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5969271.

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

The square root of 11938538 is about 3455.2189510941. The cubic root of 11938538 is about 228.5513102457.

The spelling of 11938538 in words is "eleven million, nine hundred thirty-eight thousand, five hundred thirty-eight".