306139206 has 8 divisors (see below), whose sum is σ = 612278424. Its totient is φ = 102046400.

The previous prime is 306139201. The next prime is 306139217. The reversal of 306139206 is 602931603.

It is a happy number.

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

306139206 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 (306139201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25511595 + ... + 25511606.

It is an arithmetic number, because the mean of its divisors is an integer number (76534803).

Almost surely, 2^306139206 is an apocalyptic number.

306139206 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.

306139206 is a wasteful number, since it uses less digits than its factorization.

306139206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51023206.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 306139206 is about 17496.8341707864. The cubic root of 306139206 is about 673.9685800438.

The spelling of 306139206 in words is "three hundred six million, one hundred thirty-nine thousand, two hundred six".