13605648 has 40 divisors (see below), whose sum is σ = 40170048. Its totient is φ = 3887232.

The previous prime is 13605629. The next prime is 13605649. The reversal of 13605648 is 84650631.

13605648 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13605648² = 370227314999808, which contains 22 as substring.

13605648 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (13605649) 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, 19911 + ... + 20582.

Almost surely, 2^13605648 is an apocalyptic number.

It is an amenable number.

13605648 is an abundant number, since it is smaller than the sum of its proper divisors (26564400).

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

13605648 is a wasteful number, since it uses less digits than its factorization.

13605648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40511 (or 40505 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 13605648 is about 3688.5834679454. The cubic root of 13605648 is about 238.7296769156.

The spelling of 13605648 in words is "thirteen million, six hundred five thousand, six hundred forty-eight".