11128805 has 8 divisors (see below), whose sum is σ = 13473432. Its totient is φ = 8823808.

The previous prime is 11128771. The next prime is 11128811. The reversal of 11128805 is 50882111.

It can be written as a sum of positive squares in 4 ways, for example, as 481636 + 10647169 = 694^2 + 3263^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11128805 - 2¹⁴ = 11112421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9284 + ... + 10413.

It is an arithmetic number, because the mean of its divisors is an integer number (1684179).

Almost surely, 2^11128805 is an apocalyptic number.

It is an amenable number.

11128805 is a deficient number, since it is larger than the sum of its proper divisors (2344627).

11128805 is a wasteful number, since it uses less digits than its factorization.

11128805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19815.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 11128805 is about 3335.9863608834. The cubic root of 11128805 is about 223.2627025974.

The spelling of 11128805 in words is "eleven million, one hundred twenty-eight thousand, eight hundred five".