11641878 has 12 divisors (see below), whose sum is σ = 25224108. Its totient is φ = 3880620.

The previous prime is 11641873. The next prime is 11641879. The reversal of 11641878 is 87814611.

11641878 is a `hidden beast` number, since 1 + 1 + 641 + 8 + 7 + 8 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11641871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 323368 + ... + 323403.

It is an arithmetic number, because the mean of its divisors is an integer number (2102009).

Almost surely, 2^11641878 is an apocalyptic number.

11641878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11641878 is an abundant number, since it is smaller than the sum of its proper divisors (13582230).

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

11641878 is a wasteful number, since it uses less digits than its factorization.

11641878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646779 (or 646776 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 11641878 is about 3412.0196365203. The cubic root of 11641878 is about 226.6423238948.

The spelling of 11641878 in words is "eleven million, six hundred forty-one thousand, eight hundred seventy-eight".