208685420 has 24 divisors (see below), whose sum is σ = 443167200. Its totient is φ = 82535552.

The previous prime is 208685381. The next prime is 208685431. The reversal of 208685420 is 24586802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56840 + ... + 60399.

It is an arithmetic number, because the mean of its divisors is an integer number (18465300).

Almost surely, 2^208685420 is an apocalyptic number.

208685420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208685420 is an abundant number, since it is smaller than the sum of its proper divisors (234481780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208685420 is a wasteful number, since it uses less digits than its factorization.

208685420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117337 (or 117335 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 208685420 is about 14445.9482208680. The cubic root of 208685420 is about 593.1493187164.

The spelling of 208685420 in words is "two hundred eight million, six hundred eighty-five thousand, four hundred twenty".