138628203 has 24 divisors (see below), whose sum is σ = 216340992. Its totient is φ = 78727824.

The previous prime is 138628169. The next prime is 138628211. The reversal of 138628203 is 302826831.

It is not a de Polignac number, because 138628203 - 2⁸ = 138627947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138628223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21726 + ... + 27372.

It is an arithmetic number, because the mean of its divisors is an integer number (9014208).

Almost surely, 2^138628203 is an apocalyptic number.

138628203 is a deficient number, since it is larger than the sum of its proper divisors (77712789).

138628203 is a wasteful number, since it uses less digits than its factorization.

138628203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5831 (or 5824 counting only the distinct ones).

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

The square root of 138628203 is about 11774.0478595936. The cubic root of 138628203 is about 517.5478767346.

It can be divided in two parts, 138628 and 203, that added together give a palindrome (138831).

The spelling of 138628203 in words is "one hundred thirty-eight million, six hundred twenty-eight thousand, two hundred three".