11778863 has 4 divisors (see below), whose sum is σ = 11794440. Its totient is φ = 11763288.

The previous prime is 11778859. The next prime is 11778889. The reversal of 11778863 is 36887711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36887711 = 7 ⋅5269673.

It is a cyclic number.

It is not a de Polignac number, because 11778863 - 2² = 11778859 is a prime.

It is a super-2 number, since 2×11778863² = 277483227145538, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11778863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6593 + ... + 8186.

It is an arithmetic number, because the mean of its divisors is an integer number (2948610).

Almost surely, 2^11778863 is an apocalyptic number.

11778863 is a deficient number, since it is larger than the sum of its proper divisors (15577).

11778863 is an equidigital number, since it uses as much as digits as its factorization.

11778863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15576.

The product of its digits is 56448, while the sum is 41.

The square root of 11778863 is about 3432.0348191707. The cubic root of 11778863 is about 227.5277943741.

The spelling of 11778863 in words is "eleven million, seven hundred seventy-eight thousand, eight hundred sixty-three".