138449108 has 18 divisors (see below), whose sum is σ = 281843226. Its totient is φ = 59335248.

The previous prime is 138449107. The next prime is 138449117. The reversal of 138449108 is 801944831.

It can be written as a sum of positive squares in only one way, i.e., 131148304 + 7300804 = 11452^2 + 2702^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138449107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 352991 + ... + 353382.

It is an arithmetic number, because the mean of its divisors is an integer number (15657957).

Almost surely, 2^138449108 is an apocalyptic number.

It is an amenable number.

138449108 is an abundant number, since it is smaller than the sum of its proper divisors (143394118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138449108 is a wasteful number, since it uses less digits than its factorization.

138449108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706391 (or 706382 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 138449108 is about 11766.4399033862. The cubic root of 138449108 is about 517.3249057965.

The spelling of 138449108 in words is "one hundred thirty-eight million, four hundred forty-nine thousand, one hundred eight".