11997786 has 8 divisors (see below), whose sum is σ = 23995584. Its totient is φ = 3999260.

The previous prime is 11997751. The next prime is 11997787. The reversal of 11997786 is 68779911.

It is a happy number.

11997786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

11997786 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (11997787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999810 + ... + 999821.

It is an arithmetic number, because the mean of its divisors is an integer number (2999448).

Almost surely, 2^11997786 is an apocalyptic number.

11997786 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11997786 is a wasteful number, since it uses less digits than its factorization.

11997786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999636.

The product of its digits is 190512, while the sum is 48.

The square root of 11997786 is about 3463.7820370225. The cubic root of 11997786 is about 228.9287676595.

The spelling of 11997786 in words is "eleven million, nine hundred ninety-seven thousand, seven hundred eighty-six".