138867332 has 6 divisors (see below), whose sum is σ = 243017838. Its totient is φ = 69433664.

The previous prime is 138867331. The next prime is 138867343. The reversal of 138867332 is 233768831.

It can be written as a sum of positive squares in only one way, i.e., 114404416 + 24462916 = 10696^2 + 4946^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138867332.

It is not an unprimeable number, because it can be changed into a prime (138867331) 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 as a sum of consecutive naturals, namely, 17358413 + ... + 17358420.

It is an arithmetic number, because the mean of its divisors is an integer number (40502973).

Almost surely, 2^138867332 is an apocalyptic number.

It is an amenable number.

138867332 is a deficient number, since it is larger than the sum of its proper divisors (104150506).

138867332 is a wasteful number, since it uses less digits than its factorization.

138867332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34716837 (or 34716835 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 138867332 is about 11784.1984029462. The cubic root of 138867332 is about 517.8452900330.

The spelling of 138867332 in words is "one hundred thirty-eight million, eight hundred sixty-seven thousand, three hundred thirty-two".