11816778 has 16 divisors (see below), whose sum is σ = 23864256. Its totient is φ = 3900480.

The previous prime is 11816773. The next prime is 11816821. The reversal of 11816778 is 87761811.

11816778 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11816771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8943 + ... + 10178.

It is an arithmetic number, because the mean of its divisors is an integer number (1491516).

Almost surely, 2^11816778 is an apocalyptic number.

11816778 is an abundant number, since it is smaller than the sum of its proper divisors (12047478).

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

11816778 is a wasteful number, since it uses less digits than its factorization.

11816778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19229.

The product of its digits is 18816, while the sum is 39.

The square root of 11816778 is about 3437.5540723020. The cubic root of 11816778 is about 227.7716627525.

The spelling of 11816778 in words is "eleven million, eight hundred sixteen thousand, seven hundred seventy-eight".