11953986 has 32 divisors (see below), whose sum is σ = 26459136. Its totient is φ = 3570000.

The previous prime is 11953973. The next prime is 11953999. The reversal of 11953986 is 68935911.

11953986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11953973) and next prime (11953999).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3411 + ... + 5961.

It is an arithmetic number, because the mean of its divisors is an integer number (826848).

Almost surely, 2^11953986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11953986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13229568).

11953986 is an abundant number, since it is smaller than the sum of its proper divisors (14505150).

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

11953986 is a wasteful number, since it uses less digits than its factorization.

11953986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638.

The product of its digits is 58320, while the sum is 42.

The square root of 11953986 is about 3457.4536873254. The cubic root of 11953986 is about 228.6498465681.

The spelling of 11953986 in words is "eleven million, nine hundred fifty-three thousand, nine hundred eighty-six".