11778867 has 12 divisors (see below), whose sum is σ = 17171440. Its totient is φ = 7779888.

The previous prime is 11778859. The next prime is 11778889. The reversal of 11778867 is 76887711.

It is a happy number.

It is not a de Polignac number, because 11778867 - 2³ = 11778859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11778847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5023 + ... + 6984.

Almost surely, 2^11778867 is an apocalyptic number.

11778867 is a deficient number, since it is larger than the sum of its proper divisors (5392573).

11778867 is a wasteful number, since it uses less digits than its factorization.

11778867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122 (or 12119 counting only the distinct ones).

The product of its digits is 131712, while the sum is 45.

The square root of 11778867 is about 3432.0354019153. The cubic root of 11778867 is about 227.5278201296.

It can be divided in two parts, 117788 and 67, that added together give a triangular number (117855 = T₄₈₅).

The spelling of 11778867 in words is "eleven million, seven hundred seventy-eight thousand, eight hundred sixty-seven".