208385644 has 12 divisors (see below), whose sum is σ = 364891464. Its totient is φ = 104130944.

The previous prime is 208385633. The next prime is 208385663. The reversal of 208385644 is 446583802.

It is a junction number, because it is equal to n+sod(n) for n = 208385597 and 208385606.

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, 7429 + ... + 21724.

It is an arithmetic number, because the mean of its divisors is an integer number (30407622).

Almost surely, 2^208385644 is an apocalyptic number.

It is an amenable number.

208385644 is a deficient number, since it is larger than the sum of its proper divisors (156505820).

208385644 is a wasteful number, since it uses less digits than its factorization.

208385644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30944 (or 30942 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

The square root of 208385644 is about 14435.5687106536. The cubic root of 208385644 is about 592.8651635188.

The spelling of 208385644 in words is "two hundred eight million, three hundred eighty-five thousand, six hundred forty-four".