11987806 has 8 divisors (see below), whose sum is σ = 18040464. Its totient is φ = 5974320.

The previous prime is 11987783. The next prime is 11987837. The reversal of 11987806 is 60878911.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9015 + ... + 10258.

It is an arithmetic number, because the mean of its divisors is an integer number (2255058).

Almost surely, 2^11987806 is an apocalyptic number.

11987806 is a deficient number, since it is larger than the sum of its proper divisors (6052658).

11987806 is a wasteful number, since it uses less digits than its factorization.

11987806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19586.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 11987806 is about 3462.3411154882. The cubic root of 11987806 is about 228.8652741982.

The spelling of 11987806 in words is "eleven million, nine hundred eighty-seven thousand, eight hundred six".