11891814 has 16 divisors (see below), whose sum is σ = 25945920. Its totient is φ = 3603560.

The previous prime is 11891813. The next prime is 11891819. The reversal of 11891814 is 41819811.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11891813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90024 + ... + 90155.

It is an arithmetic number, because the mean of its divisors is an integer number (1621620).

Almost surely, 2^11891814 is an apocalyptic number.

11891814 is an abundant number, since it is smaller than the sum of its proper divisors (14054106).

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

11891814 is a wasteful number, since it uses less digits than its factorization.

11891814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180195.

The product of its digits is 2304, while the sum is 33.

The square root of 11891814 is about 3448.4509565891. The cubic root of 11891814 is about 228.2527590864.

It can be divided in two parts, 1189 and 1814, that added together give a palindrome (3003).

The spelling of 11891814 in words is "eleven million, eight hundred ninety-one thousand, eight hundred fourteen".