11888889 has 8 divisors (see below), whose sum is σ = 16686240. Its totient is φ = 7508736.

The previous prime is 11888867. The next prime is 11888909. The reversal of 11888889 is 98888811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11888889 - 2⁷ = 11888761 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11188889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104232 + ... + 104345.

It is an arithmetic number, because the mean of its divisors is an integer number (2085780).

Almost surely, 2^11888889 is an apocalyptic number.

11888889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11888889 is a deficient number, since it is larger than the sum of its proper divisors (4797351).

11888889 is a wasteful number, since it uses less digits than its factorization.

11888889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208599.

The product of its digits is 294912, while the sum is 51.

The square root of 11888889 is about 3448.0268270418. The cubic root of 11888889 is about 228.2340432968.

It can be divided in two parts, 11 and 888889, that multiplied together give a palindrome (9777779).

The spelling of 11888889 in words is "eleven million, eight hundred eighty-eight thousand, eight hundred eighty-nine".