11871880 has 16 divisors (see below), whose sum is σ = 26711820. Its totient is φ = 4748736.

The previous prime is 11871829. The next prime is 11871907. The reversal of 11871880 is 8817811.

It can be written as a sum of positive squares in 2 ways, for example, as 11792356 + 79524 = 3434^2 + 282^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148359 + ... + 148438.

Almost surely, 2^11871880 is an apocalyptic number.

11871880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11871880 is an abundant number, since it is smaller than the sum of its proper divisors (14839940).

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

11871880 is a wasteful number, since it uses less digits than its factorization.

11871880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296808 (or 296804 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 34.

The square root of 11871880 is about 3445.5594611035. The cubic root of 11871880 is about 228.1251493087.

The spelling of 11871880 in words is "eleven million, eight hundred seventy-one thousand, eight hundred eighty".