13611808 has 36 divisors (see below), whose sum is σ = 31177062. Its totient is φ = 5832960.

The previous prime is 13611803. The next prime is 13611823. The reversal of 13611808 is 80811631.

It is a happy number.

13611808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9659664 + 3952144 = 3108^2 + 1988^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (13611803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2773 + ... + 5908.

Almost surely, 2^13611808 is an apocalyptic number.

It is an amenable number.

13611808 is an abundant number, since it is smaller than the sum of its proper divisors (17565254).

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

13611808 is an equidigital number, since it uses as much as digits as its factorization.

13611808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8705 (or 8690 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 13611808 is about 3689.4183823470. The cubic root of 13611808 is about 238.7657000174.

The spelling of 13611808 in words is "thirteen million, six hundred eleven thousand, eight hundred eight".