11889880 has 16 divisors (see below), whose sum is σ = 26752320. Its totient is φ = 4755936.

The previous prime is 11889869. The next prime is 11889893. The reversal of 11889880 is 8898811.

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 3 ways as a sum of consecutive naturals, for example, 148584 + ... + 148663.

It is an arithmetic number, because the mean of its divisors is an integer number (1672020).

Almost surely, 2^11889880 is an apocalyptic number.

11889880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11889880 is an abundant number, since it is smaller than the sum of its proper divisors (14862440).

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

11889880 is a wasteful number, since it uses less digits than its factorization.

11889880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297258 (or 297254 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 43.

The square root of 11889880 is about 3448.1705294257. The cubic root of 11889880 is about 228.2403846141.

It can be divided in two parts, 11889 and 880, that added together give a square (12769 = 113²).

The spelling of 11889880 in words is "eleven million, eight hundred eighty-nine thousand, eight hundred eighty".