11989845 has 48 divisors (see below), whose sum is σ = 25159680. Its totient is φ = 5156352.

The previous prime is 11989837. The next prime is 11989883. The reversal of 11989845 is 54898911.

11989845 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11989845 - 2³ = 11989837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 11989845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4236 + ... + 6474.

It is an arithmetic number, because the mean of its divisors is an integer number (524160).

Almost surely, 2^11989845 is an apocalyptic number.

11989845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11989845 is an abundant number, since it is smaller than the sum of its proper divisors (13169835).

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

11989845 is a wasteful number, since it uses less digits than its factorization.

11989845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274 (or 2271 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 11989845 is about 3462.6355569133. The cubic root of 11989845 is about 228.8782493230.

The spelling of 11989845 in words is "eleven million, nine hundred eighty-nine thousand, eight hundred forty-five".