138883284 has 18 divisors (see below), whose sum is σ = 351066170. Its totient is φ = 46294416.

The previous prime is 138883273. The next prime is 138883289. The reversal of 138883284 is 482388831.

It can be written as a sum of positive squares in only one way, i.e., 108743184 + 30140100 = 10428^2 + 5490^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138883289) 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, 1928899 + ... + 1928970.

Almost surely, 2^138883284 is an apocalyptic number.

It is an amenable number.

138883284 is an abundant number, since it is smaller than the sum of its proper divisors (212182886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138883284 is a wasteful number, since it uses less digits than its factorization.

138883284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857879 (or 3857874 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 138883284 is about 11784.8752220802. The cubic root of 138883284 is about 517.8651179548.

The spelling of 138883284 in words is "one hundred thirty-eight million, eight hundred eighty-three thousand, two hundred eighty-four".