11888778 has 32 divisors (see below), whose sum is σ = 26373312. Its totient is φ = 3542400.

The previous prime is 11888777. The next prime is 11888827. The reversal of 11888778 is 87788811.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11888777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2550 + ... + 5502.

It is an arithmetic number, because the mean of its divisors is an integer number (824166).

Almost surely, 2^11888778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11888778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13186656).

11888778 is an abundant number, since it is smaller than the sum of its proper divisors (14484534).

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

11888778 is a wasteful number, since it uses less digits than its factorization.

11888778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030.

The product of its digits is 200704, while the sum is 48.

The square root of 11888778 is about 3448.0107308418. The cubic root of 11888778 is about 228.2333329961.

The spelling of 11888778 in words is "eleven million, eight hundred eighty-eight thousand, seven hundred seventy-eight".