11640305 has 8 divisors (see below), whose sum is σ = 14050152. Its totient is φ = 9257728.

The previous prime is 11640271. The next prime is 11640313. The reversal of 11640305 is 50304611.

It can be written as a sum of positive squares in 4 ways, for example, as 7656289 + 3984016 = 2767^2 + 1996^2 .

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 11640305 - 2⁶ = 11640241 is a prime.

It is a Duffinian number.

It is a Curzon 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, 5864 + ... + 7593.

It is an arithmetic number, because the mean of its divisors is an integer number (1756269).

Almost surely, 2^11640305 is an apocalyptic number.

It is an amenable number.

11640305 is a deficient number, since it is larger than the sum of its proper divisors (2409847).

11640305 is a wasteful number, since it uses less digits than its factorization.

11640305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13635.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 11640305 is about 3411.7891200952. The cubic root of 11640305 is about 226.6321157929.

Adding to 11640305 its reverse (50304611), we get a palindrome (61944916).

The spelling of 11640305 in words is "eleven million, six hundred forty thousand, three hundred five".