11889405 has 24 divisors (see below), whose sum is σ = 22482720. Its totient is φ = 5764320.

The previous prime is 11889403. The next prime is 11889431. The reversal of 11889405 is 50498811.

It is not a de Polignac number, because 11889405 - 2¹ = 11889403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11889405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11889401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11515 + ... + 12504.

It is an arithmetic number, because the mean of its divisors is an integer number (936780).

Almost surely, 2^11889405 is an apocalyptic number.

11889405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11889405 is a deficient number, since it is larger than the sum of its proper divisors (10593315).

11889405 is a wasteful number, since it uses less digits than its factorization.

11889405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24041 (or 24038 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 11889405 is about 3448.1016516338. The cubic root of 11889405 is about 228.2373451770.

The spelling of 11889405 in words is "eleven million, eight hundred eighty-nine thousand, four hundred five".