11881788 has 24 divisors (see below), whose sum is σ = 28315392. Its totient is φ = 3876144.

The previous prime is 11881787. The next prime is 11881789. The reversal of 11881788 is 88718811.

It is an interprime number because it is at equal distance from previous prime (11881787) and next prime (11881789).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11881781) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9970 + ... + 11097.

It is an arithmetic number, because the mean of its divisors is an integer number (1179808).

Almost surely, 2^11881788 is an apocalyptic number.

It is an amenable number.

11881788 is an abundant number, since it is smaller than the sum of its proper divisors (16433604).

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

11881788 is a wasteful number, since it uses less digits than its factorization.

11881788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21121 (or 21119 counting only the distinct ones).

The product of its digits is 28672, while the sum is 42.

The square root of 11881788 is about 3446.9969538716. The cubic root of 11881788 is about 228.1885943425.

The spelling of 11881788 in words is "eleven million, eight hundred eighty-one thousand, seven hundred eighty-eight".