138808616 has 32 divisors (see below), whose sum is σ = 275826600. Its totient is φ = 65372160.

The previous prime is 138808613. The next prime is 138808633. The reversal of 138808616 is 616808831.

138808616 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 52504516 + 86304100 = 7246^2 + 9290^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (138808613) 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, 2216 + ... + 16808.

Almost surely, 2^138808616 is an apocalyptic number.

It is an amenable number.

138808616 is a deficient number, since it is larger than the sum of its proper divisors (137017984).

138808616 is a wasteful number, since it uses less digits than its factorization.

138808616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14669 (or 14665 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 138808616 is about 11781.7068372965. The cubic root of 138808616 is about 517.7722944863.

The spelling of 138808616 in words is "one hundred thirty-eight million, eight hundred eight thousand, six hundred sixteen".