11138805 has 12 divisors (see below), whose sum is σ = 19307340. Its totient is φ = 5940672.

The previous prime is 11138767. The next prime is 11138821. The reversal of 11138805 is 50883111.

It can be written as a sum of positive squares in 2 ways, for example, as 5788836 + 5349969 = 2406^2 + 2313^2 .

It is not a de Polignac number, because 11138805 - 2⁹ = 11138293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123720 + ... + 123809.

It is an arithmetic number, because the mean of its divisors is an integer number (1608945).

Almost surely, 2^11138805 is an apocalyptic number.

11138805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11138805 is a deficient number, since it is larger than the sum of its proper divisors (8168535).

11138805 is a wasteful number, since it uses less digits than its factorization.

11138805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247540 (or 247537 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 11138805 is about 3337.4848314262. The cubic root of 11138805 is about 223.3295548976.

The spelling of 11138805 in words is "eleven million, one hundred thirty-eight thousand, eight hundred five".