11640436 has 12 divisors (see below), whose sum is σ = 20425860. Its totient is φ = 5804480.

The previous prime is 11640403. The next prime is 11640457. The reversal of 11640436 is 63404611.

It can be written as a sum of positive squares in 2 ways, for example, as 6604900 + 5035536 = 2570^2 + 2244^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11640436.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2185 + ... + 5296.

It is an arithmetic number, because the mean of its divisors is an integer number (1702155).

Almost surely, 2^11640436 is an apocalyptic number.

It is an amenable number.

11640436 is a deficient number, since it is larger than the sum of its proper divisors (8785424).

11640436 is a wasteful number, since it uses less digits than its factorization.

11640436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7874 (or 7872 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 11640436 is about 3411.8083181797. The cubic root of 11640436 is about 226.6329659623.

The spelling of 11640436 in words is "eleven million, six hundred forty thousand, four hundred thirty-six".