208248638 has 16 divisors (see below), whose sum is σ = 347254656. Its totient is φ = 93013920.

The previous prime is 208248611. The next prime is 208248641. The reversal of 208248638 is 836842802.

It is a junction number, because it is equal to n+sod(n) for n = 208248595 and 208248604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128381 + ... + 129992.

It is an arithmetic number, because the mean of its divisors is an integer number (21703416).

Almost surely, 2^208248638 is an apocalyptic number.

208248638 is a deficient number, since it is larger than the sum of its proper divisors (139006018).

208248638 is a wasteful number, since it uses less digits than its factorization.

208248638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258419.

The product of its (nonzero) digits is 147456, while the sum is 41.

The square root of 208248638 is about 14430.8224990816. The cubic root of 208248638 is about 592.7352059225.

The spelling of 208248638 in words is "two hundred eight million, two hundred forty-eight thousand, six hundred thirty-eight".