208420670 has 16 divisors (see below), whose sum is σ = 375329808. Its totient is φ = 83329920.

The previous prime is 208420669. The next prime is 208420673. The reversal of 208420670 is 76024802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208420673) by changing a digit.

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, 30182 + ... + 36438.

It is an arithmetic number, because the mean of its divisors is an integer number (23458113).

Almost surely, 2^208420670 is an apocalyptic number.

208420670 is a deficient number, since it is larger than the sum of its proper divisors (166909138).

208420670 is a wasteful number, since it uses less digits than its factorization.

208420670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9595.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 208420670 is about 14436.7818436104. The cubic root of 208420670 is about 592.8983784298.

The spelling of 208420670 in words is "two hundred eight million, four hundred twenty thousand, six hundred seventy".