635723228 has 48 divisors (see below), whose sum is σ = 1362541824. Its totient is φ = 253320960.

The previous prime is 635723161. The next prime is 635723267. The reversal of 635723228 is 822327536.

It is a junction number, because it is equal to n+sod(n) for n = 635723191 and 635723200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31463 + ... + 47553.

It is an arithmetic number, because the mean of its divisors is an integer number (28386288).

Almost surely, 2^635723228 is an apocalyptic number.

635723228 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 635723228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (681270912).

635723228 is an abundant number, since it is smaller than the sum of its proper divisors (726818596).

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

635723228 is a wasteful number, since it uses less digits than its factorization.

635723228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16202 (or 16200 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 635723228 is about 25213.5524668778. The cubic root of 635723228 is about 859.8499954705.

The spelling of 635723228 in words is "six hundred thirty-five million, seven hundred twenty-three thousand, two hundred twenty-eight".