138284288 has 18 divisors (see below), whose sum is σ = 276028914. Its totient is φ = 69142016.

The previous prime is 138284269. The next prime is 138284309. The reversal of 138284288 is 882482831.

138284288 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 131974144 + 6310144 = 11488^2 + 2512^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269831 + ... + 270342.

Almost surely, 2^138284288 is an apocalyptic number.

It is an amenable number.

138284288 is a deficient number, since it is larger than the sum of its proper divisors (137744626).

138284288 is an frugal number, since it uses more digits than its factorization.

138284288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540189 (or 540175 counting only the distinct ones).

The product of its digits is 196608, while the sum is 44.

The square root of 138284288 is about 11759.4339999849. The cubic root of 138284288 is about 517.1195370752.

The spelling of 138284288 in words is "one hundred thirty-eight million, two hundred eighty-four thousand, two hundred eighty-eight".