138328771 has 8 divisors (see below), whose sum is σ = 158171744. Its totient is φ = 118506240.

The previous prime is 138328741. The next prime is 138328777. The reversal of 138328771 is 177823831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138328771 - 2⁹ = 138328259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138328777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14341 + ... + 21961.

It is an arithmetic number, because the mean of its divisors is an integer number (19771468).

Almost surely, 2^138328771 is an apocalyptic number.

138328771 is a deficient number, since it is larger than the sum of its proper divisors (19842973).

138328771 is an equidigital number, since it uses as much as digits as its factorization.

138328771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10221.

The product of its digits is 56448, while the sum is 40.

The square root of 138328771 is about 11761.3252229500. The cubic root of 138328771 is about 517.1749797738.

The spelling of 138328771 in words is "one hundred thirty-eight million, three hundred twenty-eight thousand, seven hundred seventy-one".