11638005 has 16 divisors (see below), whose sum is σ = 18973440. Its totient is φ = 6089408.

The previous prime is 11638001. The next prime is 11638027. The reversal of 11638005 is 50083611.

It is a cyclic number.

It is not a de Polignac number, because 11638005 - 2² = 11638001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11638001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6525 + ... + 8114.

It is an arithmetic number, because the mean of its divisors is an integer number (1185840).

Almost surely, 2^11638005 is an apocalyptic number.

11638005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11638005 is a deficient number, since it is larger than the sum of its proper divisors (7335435).

11638005 is a wasteful number, since it uses less digits than its factorization.

11638005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14700.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 11638005 is about 3411.4520368899. The cubic root of 11638005 is about 226.6171881141.

The spelling of 11638005 in words is "eleven million, six hundred thirty-eight thousand, five".