138827306 has 16 divisors (see below), whose sum is σ = 214657344. Its totient is φ = 67298784.

The previous prime is 138827291. The next prime is 138827317. The reversal of 138827306 is 603728831.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 138827306.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5891 + ... + 17673.

It is an arithmetic number, because the mean of its divisors is an integer number (13416084).

Almost surely, 2^138827306 is an apocalyptic number.

It is a pronic number, being equal to 11782×11783.

138827306 is a deficient number, since it is larger than the sum of its proper divisors (75830038).

138827306 is a wasteful number, since it uses less digits than its factorization.

138827306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11965.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 138827306 is about 11782.4999893910. The cubic root of 138827306 is about 517.7955320685.

The spelling of 138827306 in words is "one hundred thirty-eight million, eight hundred twenty-seven thousand, three hundred six".