138503228 has 12 divisors (see below), whose sum is σ = 243162192. Its totient is φ = 69028320.

The previous prime is 138503221. The next prime is 138503243. The reversal of 138503228 is 822305831.

138503228 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138503194 and 138503203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138503221) 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, 54425 + ... + 56912.

It is an arithmetic number, because the mean of its divisors is an integer number (20263516).

Almost surely, 2^138503228 is an apocalyptic number.

It is an amenable number.

138503228 is a deficient number, since it is larger than the sum of its proper divisors (104658964).

138503228 is a wasteful number, since it uses less digits than its factorization.

138503228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111652 (or 111650 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 138503228 is about 11768.7394397191. The cubic root of 138503228 is about 517.3923047538.

The spelling of 138503228 in words is "one hundred thirty-eight million, five hundred three thousand, two hundred twenty-eight".