138303028 has 24 divisors (see below), whose sum is σ = 251175680. Its totient is φ = 66562560.

The previous prime is 138302977. The next prime is 138303029. The reversal of 138303028 is 820303831.

It is a junction number, because it is equal to n+sod(n) for n = 138302987 and 138303005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138303029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21043 + ... + 26821.

Almost surely, 2^138303028 is an apocalyptic number.

It is an amenable number.

138303028 is a deficient number, since it is larger than the sum of its proper divisors (112872652).

138303028 is a wasteful number, since it uses less digits than its factorization.

138303028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6007 (or 6005 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 138303028 is about 11760.2307800485. The cubic root of 138303028 is about 517.1428956759.

Adding to 138303028 its reverse (820303831), we get a palindrome (958606859).

The spelling of 138303028 in words is "one hundred thirty-eight million, three hundred three thousand, twenty-eight".