138871306 has 8 divisors (see below), whose sum is σ = 238065120. Its totient is φ = 59516268.

The previous prime is 138871301. The next prime is 138871307. The reversal of 138871306 is 603178831.

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

It is not an unprimeable number, because it can be changed into a prime (138871301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4959676 + ... + 4959703.

It is an arithmetic number, because the mean of its divisors is an integer number (29758140).

Almost surely, 2^138871306 is an apocalyptic number.

138871306 is a deficient number, since it is larger than the sum of its proper divisors (99193814).

138871306 is an equidigital number, since it uses as much as digits as its factorization.

138871306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9919388.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 138871306 is about 11784.3670173667. The cubic root of 138871306 is about 517.8502297538.

The spelling of 138871306 in words is "one hundred thirty-eight million, eight hundred seventy-one thousand, three hundred six".