13640956 has 12 divisors (see below), whose sum is σ = 27281968. Its totient is φ = 5846112.

The previous prime is 13640947. The next prime is 13640989. The reversal of 13640956 is 65904631.

13640956 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243561 + ... + 243616.

Almost surely, 2^13640956 is an apocalyptic number.

It is an amenable number.

13640956 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13640956 is a wasteful number, since it uses less digits than its factorization.

13640956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487188 (or 487186 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 13640956 is about 3693.3664860125. The cubic root of 13640956 is about 238.9360075636.

The spelling of 13640956 in words is "thirteen million, six hundred forty thousand, nine hundred fifty-six".