138208486 has 16 divisors (see below), whose sum is σ = 223776000. Its totient is φ = 63641088.

The previous prime is 138208481. The next prime is 138208507. The reversal of 138208486 is 684802831.

138208486 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138208481) 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, 5755 + ... + 17593.

It is an arithmetic number, because the mean of its divisors is an integer number (13986000).

Almost surely, 2^138208486 is an apocalyptic number.

138208486 is a deficient number, since it is larger than the sum of its proper divisors (85567514).

138208486 is a wasteful number, since it uses less digits than its factorization.

138208486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12303.

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 138208486 is about 11756.2105289077. The cubic root of 138208486 is about 517.0250316177.

The spelling of 138208486 in words is "one hundred thirty-eight million, two hundred eight thousand, four hundred eighty-six".