224172636 has 12 divisors (see below), whose sum is σ = 523069512. Its totient is φ = 74724208.

The previous prime is 224172623. The next prime is 224172643. The reversal of 224172636 is 636271422.

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

It is a junction number, because it is equal to n+sod(n) for n = 224172597 and 224172606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9340515 + ... + 9340538.

It is an arithmetic number, because the mean of its divisors is an integer number (43589126).

Almost surely, 2^224172636 is an apocalyptic number.

It is an amenable number.

224172636 is an abundant number, since it is smaller than the sum of its proper divisors (298896876).

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

224172636 is a wasteful number, since it uses less digits than its factorization.

224172636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18681060 (or 18681058 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The square root of 224172636 is about 14972.3958002719. The cubic root of 224172636 is about 607.4737735295.

The spelling of 224172636 in words is "two hundred twenty-four million, one hundred seventy-two thousand, six hundred thirty-six".