11640538 has 24 divisors (see below), whose sum is σ = 21876372. Its totient is φ = 4604544.

The previous prime is 11640527. The next prime is 11640539. The reversal of 11640538 is 83504611.

It can be written as a sum of positive squares in 2 ways, for example, as 8602489 + 3038049 = 2933^2 + 1743^2 .

It is not an unprimeable number, because it can be changed into a prime (11640539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3295 + ... + 5842.

Almost surely, 2^11640538 is an apocalyptic number.

11640538 is a deficient number, since it is larger than the sum of its proper divisors (10235834).

11640538 is a wasteful number, since it uses less digits than its factorization.

11640538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166 (or 9159 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 11640538 is about 3411.8232662317. The cubic root of 11640538 is about 226.6336279219.

The spelling of 11640538 in words is "eleven million, six hundred forty thousand, five hundred thirty-eight".