138295808 has 80 divisors (see below), whose sum is σ = 322907904. Its totient is φ = 57937920.

The previous prime is 138295789. The next prime is 138295811. The reversal of 138295808 is 808592831.

138295808 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168038 + ... + 168858.

Almost surely, 2^138295808 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 138295808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161453952).

138295808 is an abundant number, since it is smaller than the sum of its proper divisors (184612096).

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

138295808 is an frugal number, since it uses more digits than its factorization.

With its successor (138295809) it forms an eRAP, since the sums of their prime factors are consecutive (893 and 894).

138295808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 138295808 is about 11759.9238092770. The cubic root of 138295808 is about 517.1338965076.

The spelling of 138295808 in words is "one hundred thirty-eight million, two hundred ninety-five thousand, eight hundred eight".