138028330 has 24 divisors (see below), whose sum is σ = 273093156. Its totient is φ = 50191680.

The previous prime is 138028291. The next prime is 138028351. The reversal of 138028330 is 33820831.

It can be written as a sum of positive squares in 2 ways, for example, as 132641289 + 5387041 = 11517^2 + 2321^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55827 + ... + 58246.

Almost surely, 2^138028330 is an apocalyptic number.

138028330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138028330 is a deficient number, since it is larger than the sum of its proper divisors (135064826).

138028330 is a wasteful number, since it uses less digits than its factorization.

138028330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114102 (or 114091 counting only the distinct ones).

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

The square root of 138028330 is about 11748.5458674680. The cubic root of 138028330 is about 516.8002850157.

The spelling of 138028330 in words is "one hundred thirty-eight million, twenty-eight thousand, three hundred thirty".