5181636 has 12 divisors (see below), whose sum is σ = 12090512. Its totient is φ = 1727208.

The previous prime is 5181611. The next prime is 5181637. The reversal of 5181636 is 6361815.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (5181637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215890 + ... + 215913.

Almost surely, 2^5181636 is an apocalyptic number.

It is an amenable number.

5181636 is an abundant number, since it is smaller than the sum of its proper divisors (6908876).

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

5181636 is a wasteful number, since it uses less digits than its factorization.

5181636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431810 (or 431808 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 5181636 is about 2276.3207155408. The cubic root of 5181636 is about 173.0436367364.

The spelling of 5181636 in words is "five million, one hundred eighty-one thousand, six hundred thirty-six".