11967538 has 16 divisors (see below), whose sum is σ = 19641024. Its totient is φ = 5423760.

The previous prime is 11967533. The next prime is 11967551. The reversal of 11967538 is 83576911.

11967538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 11967538.

It is not an unprimeable number, because it can be changed into a prime (11967533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10156 + ... + 11272.

It is an arithmetic number, because the mean of its divisors is an integer number (1227564).

Almost surely, 2^11967538 is an apocalyptic number.

11967538 is a deficient number, since it is larger than the sum of its proper divisors (7673486).

11967538 is a wasteful number, since it uses less digits than its factorization.

11967538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617.

The product of its digits is 45360, while the sum is 40.

The square root of 11967538 is about 3459.4129559797. The cubic root of 11967538 is about 228.7362192222.

The spelling of 11967538 in words is "eleven million, nine hundred sixty-seven thousand, five hundred thirty-eight".