138028206 has 8 divisors (see below), whose sum is σ = 276056424. Its totient is φ = 46009400.

The previous prime is 138028201. The next prime is 138028207. The reversal of 138028206 is 602820831.

It is a sphenic number, since it is the product of 3 distinct primes.

138028206 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138028201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11502345 + ... + 11502356.

It is an arithmetic number, because the mean of its divisors is an integer number (34507053).

Almost surely, 2^138028206 is an apocalyptic number.

138028206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138028206 is a wasteful number, since it uses less digits than its factorization.

138028206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23004706.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 138028206 is about 11748.5405902180. The cubic root of 138028206 is about 516.8001302570.

The spelling of 138028206 in words is "one hundred thirty-eight million, twenty-eight thousand, two hundred six".