11640686 has 16 divisors (see below), whose sum is σ = 18137088. Its totient is φ = 5597400.

The previous prime is 11640677. The next prime is 11640689. The reversal of 11640686 is 68604611.

It is a happy number.

It is a super-3 number, since 3×11640686³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11640689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11351 + ... + 12333.

It is an arithmetic number, because the mean of its divisors is an integer number (1133568).

Almost surely, 2^11640686 is an apocalyptic number.

11640686 is a deficient number, since it is larger than the sum of its proper divisors (6496402).

11640686 is a wasteful number, since it uses less digits than its factorization.

11640686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 11640686 is about 3411.8449554457. The cubic root of 11640686 is about 226.6345884055.

The spelling of 11640686 in words is "eleven million, six hundred forty thousand, six hundred eighty-six".