138706576 has 20 divisors (see below), whose sum is σ = 269612332. Its totient is φ = 69129216.

The previous prime is 138706501. The next prime is 138706577. The reversal of 138706576 is 675607831.

It can be written as a sum of positive squares in 2 ways, for example, as 1254400 + 137452176 = 1120^2 + 11724^2 .

It is not an unprimeable number, because it can be changed into a prime (138706577) 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 3 ways as a sum of consecutive naturals, for example, 8841 + ... + 18856.

Almost surely, 2^138706576 is an apocalyptic number.

138706576 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138706576 is a deficient number, since it is larger than the sum of its proper divisors (130905756).

138706576 is a wasteful number, since it uses less digits than its factorization.

138706576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28018 (or 28012 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 138706576 is about 11777.3755990034. The cubic root of 138706576 is about 517.6453896924.

The spelling of 138706576 in words is "one hundred thirty-eight million, seven hundred six thousand, five hundred seventy-six".