188881 has 12 divisors (see below), whose sum is σ = 238336. Its totient is φ = 146520.

The previous prime is 188869. The next prime is 188891.

188881 = 126² + 127² + ... + 136².

188881 is nontrivially palindromic in base 10.

188881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 188881 - 2⁷ = 188753 is a prime.

It is a super-2 number, since 2×188881² = 71352064322, which contains 22 as substring.

188881 is a strobogrammatic number because it is the same when read upside-down.

188881 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 736 + ... + 958.

2¹⁸⁸⁸⁸¹ is an apocalyptic number.

188881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

188881 is a deficient number, since it is larger than the sum of its proper divisors (49455).

188881 is a wasteful number, since it uses less digits than its factorization.

188881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 241 counting only the distinct ones).

The product of its digits is 4096, while the sum is 34.

The square root of 188881 is about 434.6044178330. The cubic root of 188881 is about 57.3758885729.

The spelling of 188881 in words is "one hundred eighty-eight thousand, eight hundred eighty-one".