208639672 has 16 divisors (see below), whose sum is σ = 403819200. Its totient is φ = 100954560.

The previous prime is 208639663. The next prime is 208639681. The reversal of 208639672 is 276936802.

It is an interprime number because it is at equal distance from previous prime (208639663) and next prime (208639681).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420397 + ... + 420892.

It is an arithmetic number, because the mean of its divisors is an integer number (25238700).

Almost surely, 2^208639672 is an apocalyptic number.

It is an amenable number.

208639672 is a deficient number, since it is larger than the sum of its proper divisors (195179528).

208639672 is a wasteful number, since it uses less digits than its factorization.

208639672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841326 (or 841322 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 208639672 is about 14444.3647143099. The cubic root of 208639672 is about 593.1059721678.

The spelling of 208639672 in words is "two hundred eight million, six hundred thirty-nine thousand, six hundred seventy-two".