11967138 has 24 divisors (see below), whose sum is σ = 26318448. Its totient is φ = 3929112.

The previous prime is 11967119. The next prime is 11967139. The reversal of 11967138 is 83176911.

11967138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11967138² = 286424783822088, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11967139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3756 + ... + 6167.

It is an arithmetic number, because the mean of its divisors is an integer number (1096602).

Almost surely, 2^11967138 is an apocalyptic number.

11967138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11967138 is an abundant number, since it is smaller than the sum of its proper divisors (14351310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11967138 is a wasteful number, since it uses less digits than its factorization.

11967138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9998 (or 9995 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 11967138 is about 3459.3551422194. The cubic root of 11967138 is about 228.7336707864.

The spelling of 11967138 in words is "eleven million, nine hundred sixty-seven thousand, one hundred thirty-eight".