11813878 has 16 divisors (see below), whose sum is σ = 19272384. Its totient is φ = 5408640.

The previous prime is 11813849. The next prime is 11813887. The reversal of 11813878 is 87831811.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

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, 3438 + ... + 5953.

It is an arithmetic number, because the mean of its divisors is an integer number (1204524).

Almost surely, 2^11813878 is an apocalyptic number.

11813878 is a deficient number, since it is larger than the sum of its proper divisors (7458506).

11813878 is a wasteful number, since it uses less digits than its factorization.

11813878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9447.

The product of its digits is 10752, while the sum is 37.

The square root of 11813878 is about 3437.1322348726. The cubic root of 11813878 is about 227.7530284608.

The spelling of 11813878 in words is "eleven million, eight hundred thirteen thousand, eight hundred seventy-eight".