13613436 has 18 divisors (see below), whose sum is σ = 34411832. Its totient is φ = 4537800.

The previous prime is 13613429. The next prime is 13613437. The reversal of 13613436 is 63431631.

13613436 is a `hidden beast` number, since 1 + 3 + 613 + 43 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13613437) 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, 189040 + ... + 189111.

Almost surely, 2^13613436 is an apocalyptic number.

It is an amenable number.

13613436 is an abundant number, since it is smaller than the sum of its proper divisors (20798396).

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

13613436 is a wasteful number, since it uses less digits than its factorization.

13613436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378161 (or 378156 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 13613436 is about 3689.6390067322. The cubic root of 13613436 is about 238.7752185929.

The spelling of 13613436 in words is "thirteen million, six hundred thirteen thousand, four hundred thirty-six".