11887988 has 36 divisors (see below), whose sum is σ = 24437952. Its totient is φ = 5045040.

The previous prime is 11887979. The next prime is 11888017. The reversal of 11887988 is 88978811.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25445 + ... + 25907.

It is an arithmetic number, because the mean of its divisors is an integer number (678832).

Almost surely, 2^11887988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11887988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12218976).

11887988 is an abundant number, since it is smaller than the sum of its proper divisors (12549964).

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

11887988 is a wasteful number, since it uses less digits than its factorization.

11887988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 603 counting only the distinct ones).

The product of its digits is 258048, while the sum is 50.

The square root of 11887988 is about 3447.8961701304. The cubic root of 11887988 is about 228.2282775753.

The spelling of 11887988 in words is "eleven million, eight hundred eighty-seven thousand, nine hundred eighty-eight".