138308452 has 6 divisors (see below), whose sum is σ = 242039798. Its totient is φ = 69154224.

The previous prime is 138308431. The next prime is 138308459. The reversal of 138308452 is 254803831.

It is a happy number.

138308452 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 133263936 + 5044516 = 11544^2 + 2246^2 .

It is not an unprimeable number, because it can be changed into a prime (138308459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17288553 + ... + 17288560.

Almost surely, 2^138308452 is an apocalyptic number.

It is an amenable number.

138308452 is a deficient number, since it is larger than the sum of its proper divisors (103731346).

138308452 is a wasteful number, since it uses less digits than its factorization.

138308452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34577117 (or 34577115 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 138308452 is about 11760.4613855069. The cubic root of 138308452 is about 517.1496560639.

The spelling of 138308452 in words is "one hundred thirty-eight million, three hundred eight thousand, four hundred fifty-two".