634223228 has 12 divisors (see below), whose sum is σ = 1130832360. Its totient is φ = 311128272.

The previous prime is 634223209. The next prime is 634223231. The reversal of 634223228 is 822322436.

It is a junction number, because it is equal to n+sod(n) for n = 634223194 and 634223203.

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, 1495598 + ... + 1496021.

It is an arithmetic number, because the mean of its divisors is an integer number (94236030).

Almost surely, 2^634223228 is an apocalyptic number.

It is an amenable number.

634223228 is a deficient number, since it is larger than the sum of its proper divisors (496609132).

634223228 is a wasteful number, since it uses less digits than its factorization.

634223228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991676 (or 2991674 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 634223228 is about 25183.7889921275. The cubic root of 634223228 is about 859.1731858759.

The spelling of 634223228 in words is "six hundred thirty-four million, two hundred twenty-three thousand, two hundred twenty-eight".