138536008 has 16 divisors (see below), whose sum is σ = 279736380. Its totient is φ = 63939648.

The previous prime is 138535997. The next prime is 138536023. The reversal of 138536008 is 800635831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 134050084 + 4485924 = 11578^2 + 2118^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665935 + ... + 666142.

Almost surely, 2^138536008 is an apocalyptic number.

It is an amenable number.

138536008 is an abundant number, since it is smaller than the sum of its proper divisors (141200372).

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

138536008 is a wasteful number, since it uses less digits than its factorization.

138536008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332096 (or 1332092 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 138536008 is about 11770.1320298457. The cubic root of 138536008 is about 517.4331191622.

The spelling of 138536008 in words is "one hundred thirty-eight million, five hundred thirty-six thousand, eight".