138890275 has 6 divisors (see below), whose sum is σ = 172223972. Its totient is φ = 111112200.

The previous prime is 138890273. The next prime is 138890287. The reversal of 138890275 is 572098831.

It is not a de Polignac number, because 138890275 - 2¹ = 138890273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138890273) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2777781 + ... + 2777830.

Almost surely, 2^138890275 is an apocalyptic number.

138890275 is a deficient number, since it is larger than the sum of its proper divisors (33333697).

138890275 is an equidigital number, since it uses as much as digits as its factorization.

138890275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555621 (or 5555616 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 138890275 is about 11785.1718273430. The cubic root of 138890275 is about 517.8738071077.

The spelling of 138890275 in words is "one hundred thirty-eight million, eight hundred ninety thousand, two hundred seventy-five".