636272238 has 32 divisors (see below), whose sum is σ = 1504488960. Its totient is φ = 175523040.

The previous prime is 636272237. The next prime is 636272257. The reversal of 636272238 is 832272636.

It is a junction number, because it is equal to n+sod(n) for n = 636272196 and 636272205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636272237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259978 + ... + 262413.

It is an arithmetic number, because the mean of its divisors is an integer number (47015280).

Almost surely, 2^636272238 is an apocalyptic number.

636272238 is an abundant number, since it is smaller than the sum of its proper divisors (868216722).

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

636272238 is a wasteful number, since it uses less digits than its factorization.

636272238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522432.

The product of its digits is 145152, while the sum is 39.

The square root of 636272238 is about 25224.4373178075. The cubic root of 636272238 is about 860.0974461421.

The spelling of 636272238 in words is "six hundred thirty-six million, two hundred seventy-two thousand, two hundred thirty-eight".