138196806 has 32 divisors (see below), whose sum is σ = 301961088. Its totient is φ = 41816640.

The previous prime is 138196801. The next prime is 138196819. The reversal of 138196806 is 608691831.

138196806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138196801) 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, 67165 + ... + 69191.

It is an arithmetic number, because the mean of its divisors is an integer number (9436284).

Almost surely, 2^138196806 is an apocalyptic number.

138196806 is an abundant number, since it is smaller than the sum of its proper divisors (163764282).

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

138196806 is a wasteful number, since it uses less digits than its factorization.

138196806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 138196806 is about 11755.7137597000. The cubic root of 138196806 is about 517.0104666112.

The spelling of 138196806 in words is "one hundred thirty-eight million, one hundred ninety-six thousand, eight hundred six".