208430685 has 32 divisors (see below), whose sum is σ = 383328000. Its totient is φ = 107327808.

The previous prime is 208430683. The next prime is 208430687. The reversal of 208430685 is 586034802.

It is an interprime number because it is at equal distance from previous prime (208430683) and next prime (208430687).

It is not a de Polignac number, because 208430685 - 2¹ = 208430683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208430681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22705 + ... + 30534.

It is an arithmetic number, because the mean of its divisors is an integer number (11979000).

Almost surely, 2^208430685 is an apocalyptic number.

It is an amenable number.

208430685 is a deficient number, since it is larger than the sum of its proper divisors (174897315).

208430685 is a wasteful number, since it uses less digits than its factorization.

208430685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53282 (or 53276 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 208430685 is about 14437.1286965241. The cubic root of 208430685 is about 592.9078749002.

The spelling of 208430685 in words is "two hundred eight million, four hundred thirty thousand, six hundred eighty-five".