208147138 has 8 divisors (see below), whose sum is σ = 315252288. Its totient is φ = 103063044.

The previous prime is 208147129. The next prime is 208147139. The reversal of 208147138 is 831741802.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (208147139) 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, 505006 + ... + 505417.

It is an arithmetic number, because the mean of its divisors is an integer number (39406536).

Almost surely, 2^208147138 is an apocalyptic number.

208147138 is a deficient number, since it is larger than the sum of its proper divisors (107105150).

208147138 is a wasteful number, since it uses less digits than its factorization.

208147138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010528.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 208147138 is about 14427.3052923961. The cubic root of 208147138 is about 592.6388909262.

The spelling of 208147138 in words is "two hundred eight million, one hundred forty-seven thousand, one hundred thirty-eight".