13605988 has 24 divisors (see below), whose sum is σ = 26873280. Its totient is φ = 5970720.

The previous prime is 13605961. The next prime is 13606003. The reversal of 13605988 is 88950631.

It is a happy number.

It is a super-2 number, since 2×13605988² = 370245818912288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13605988.

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 7 ways as a sum of consecutive naturals, for example, 4056 + ... + 6607.

It is an arithmetic number, because the mean of its divisors is an integer number (1119720).

Almost surely, 2^13605988 is an apocalyptic number.

It is an amenable number.

13605988 is a deficient number, since it is larger than the sum of its proper divisors (13267292).

13605988 is a wasteful number, since it uses less digits than its factorization.

13605988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10707 (or 10705 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 13605988 is about 3688.6295558107. The cubic root of 13605988 is about 238.7316654872.

The spelling of 13605988 in words is "thirteen million, six hundred five thousand, nine hundred eighty-eight".