11916538 has 4 divisors (see below), whose sum is σ = 17874810. Its totient is φ = 5958268.

The previous prime is 11916523. The next prime is 11916539. The reversal of 11916538 is 83561911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10517049 + 1399489 = 3243^2 + 1183^2 .

It is not an unprimeable number, because it can be changed into a prime (11916539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2979133 + ... + 2979136.

Almost surely, 2^11916538 is an apocalyptic number.

11916538 is a deficient number, since it is larger than the sum of its proper divisors (5958272).

11916538 is an equidigital number, since it uses as much as digits as its factorization.

11916538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5958271.

The product of its digits is 6480, while the sum is 34.

The square root of 11916538 is about 3452.0338932287. The cubic root of 11916538 is about 228.4108346264.

The spelling of 11916538 in words is "eleven million, nine hundred sixteen thousand, five hundred thirty-eight".