11778 has 16 divisors (see below), whose sum is σ = 25536. Its totient is φ = 3600.

The previous prime is 11777. The next prime is 11779. The reversal of 11778 is 87711.

11778 is nontrivially palindromic in base 12.

It is an interprime number because it is at equal distance from previous prime (11777) and next prime (11779).

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3 + ... + 153.

It is an arithmetic number, because the mean of its divisors is an integer number (1596).

2¹¹⁷⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12768).

11778 is an abundant number, since it is smaller than the sum of its proper divisors (13758).

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

11778 is a wasteful number, since it uses less digits than its factorization.

11778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169.

The product of its digits is 392, while the sum is 24.

The square root of 11778 is about 108.5264944610. The cubic root of 11778 is about 22.7522237491.

It can be divided in two parts, 11 and 778, that multiplied together give a palindrome (8558).

The spelling of 11778 in words is "eleven thousand, seven hundred seventy-eight".