11289605 has 8 divisors (see below), whose sum is σ = 13571064. Its totient is φ = 9016000.

The previous prime is 11289601. The next prime is 11289617. The reversal of 11289605 is 50698211.

11289605 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4330561 + 6959044 = 2081^2 + 2638^2 .

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

It is not a de Polignac number, because 11289605 - 2² = 11289601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11289601) 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, 1895 + ... + 5115.

It is an arithmetic number, because the mean of its divisors is an integer number (1696383).

Almost surely, 2^11289605 is an apocalyptic number.

It is an amenable number.

11289605 is a deficient number, since it is larger than the sum of its proper divisors (2281459).

11289605 is an equidigital number, since it uses as much as digits as its factorization.

11289605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3927.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 11289605 is about 3360.0007440475. Note that the first 3 decimals coincide. The cubic root of 11289605 is about 224.3328716461.

The spelling of 11289605 in words is "eleven million, two hundred eighty-nine thousand, six hundred five".