138869808 has 80 divisors (see below), whose sum is σ = 447280896. Its totient is φ = 36069120.

The previous prime is 138869807. The next prime is 138869813. The reversal of 138869808 is 808968831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138869807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15091 + ... + 22482.

Almost surely, 2^138869808 is an apocalyptic number.

It is an amenable number.

138869808 is an abundant number, since it is smaller than the sum of its proper divisors (308411088).

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

138869808 is a wasteful number, since it uses less digits than its factorization.

138869808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37602 (or 37596 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 138869808 is about 11784.3034584145. The cubic root of 138869808 is about 517.8483677363.

The spelling of 138869808 in words is "one hundred thirty-eight million, eight hundred sixty-nine thousand, eight hundred eight".