11640587 has 6 divisors (see below), whose sum is σ = 13541148. Its totient is φ = 9977604.

The previous prime is 11640583. The next prime is 11640611. The reversal of 11640587 is 78504611.

It is a happy number.

It is not a de Polignac number, because 11640587 - 2² = 11640583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11640583) 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 5 ways as a sum of consecutive naturals, for example, 118733 + ... + 118830.

It is an arithmetic number, because the mean of its divisors is an integer number (2256858).

Almost surely, 2^11640587 is an apocalyptic number.

11640587 is a deficient number, since it is larger than the sum of its proper divisors (1900561).

11640587 is an equidigital number, since it uses as much as digits as its factorization.

11640587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237577 (or 237570 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 11640587 is about 3411.8304471354. The cubic root of 11640587 is about 226.6339459208.

The spelling of 11640587 in words is "eleven million, six hundred forty thousand, five hundred eighty-seven".