11891886 has 16 divisors (see below), whose sum is σ = 24364368. Its totient is φ = 3867200.

The previous prime is 11891833. The next prime is 11891917. The reversal of 11891886 is 68819811.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23925 + ... + 24416.

It is an arithmetic number, because the mean of its divisors is an integer number (1522773).

Almost surely, 2^11891886 is an apocalyptic number.

11891886 is an abundant number, since it is smaller than the sum of its proper divisors (12472482).

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

11891886 is a wasteful number, since it uses less digits than its factorization.

11891886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48387.

The product of its digits is 27648, while the sum is 42.

The square root of 11891886 is about 3448.4613960432. The cubic root of 11891886 is about 228.2532197440.

The spelling of 11891886 in words is "eleven million, eight hundred ninety-one thousand, eight hundred eighty-six".