63138228 has 12 divisors (see below), whose sum is σ = 147322560. Its totient is φ = 21046072.

The previous prime is 63138223. The next prime is 63138247. The reversal of 63138228 is 82283136.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63138223) 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, 2630748 + ... + 2630771.

It is an arithmetic number, because the mean of its divisors is an integer number (12276880).

Almost surely, 2^63138228 is an apocalyptic number.

It is an amenable number.

63138228 is an abundant number, since it is smaller than the sum of its proper divisors (84184332).

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

63138228 is a wasteful number, since it uses less digits than its factorization.

63138228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261526 (or 5261524 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 63138228 is about 7945.9567076596. The cubic root of 63138228 is about 398.1965225600.

It can be divided in two parts, 6313 and 8228, that added together give a palindrome (14541).

The spelling of 63138228 in words is "sixty-three million, one hundred thirty-eight thousand, two hundred twenty-eight".