208730857 has 8 divisors (see below), whose sum is σ = 210168000. Its totient is φ = 207299184.

The previous prime is 208730833. The next prime is 208730861. The reversal of 208730857 is 758037802.

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

It is a cyclic number.

It is not a de Polignac number, because 208730857 - 2¹⁵ = 208698089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208730867) 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, 98394 + ... + 100492.

It is an arithmetic number, because the mean of its divisors is an integer number (26271000).

Almost surely, 2^208730857 is an apocalyptic number.

It is an amenable number.

208730857 is a deficient number, since it is larger than the sum of its proper divisors (1437143).

208730857 is a wasteful number, since it uses less digits than its factorization.

208730857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 208730857 is about 14447.5207907793. The cubic root of 208730857 is about 593.1923643204.

The spelling of 208730857 in words is "two hundred eight million, seven hundred thirty thousand, eight hundred fifty-seven".