13009656 has 32 divisors (see below), whose sum is σ = 35481600. Its totient is φ = 3942240.

The previous prime is 13009639. The next prime is 13009663. The reversal of 13009656 is 65690031.

It is a happy number.

It is a super-2 number, since 2×13009656² = 338502298476672, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 24376 + ... + 24903.

It is an arithmetic number, because the mean of its divisors is an integer number (1108800).

Almost surely, 2^13009656 is an apocalyptic number.

It is an amenable number.

13009656 is an abundant number, since it is smaller than the sum of its proper divisors (22471944).

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

13009656 is a wasteful number, since it uses less digits than its factorization.

13009656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49299 (or 49295 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 13009656 is about 3606.8900731794. The cubic root of 13009656 is about 235.1916709994.

Adding to 13009656 its reverse (65690031), we get a palindrome (78699687).

The spelling of 13009656 in words is "thirteen million, nine thousand, six hundred fifty-six".