138587008 has 64 divisors (see below), whose sum is σ = 318117600. Its totient is φ = 58908672.

The previous prime is 138587003. The next prime is 138587023. The reversal of 138587008 is 800785831.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138587003) 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, 122188 + ... + 123316.

Almost surely, 2^138587008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138587008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159058800).

138587008 is an abundant number, since it is smaller than the sum of its proper divisors (179530592).

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

138587008 is a wasteful number, since it uses less digits than its factorization.

138587008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287 (or 1275 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 138587008 is about 11772.2983312521. The cubic root of 138587008 is about 517.4966065108.

The spelling of 138587008 in words is "one hundred thirty-eight million, five hundred eighty-seven thousand, eight".