208285890 has 32 divisors (see below), whose sum is σ = 500316480. Its totient is φ = 55495104.

The previous prime is 208285877. The next prime is 208285897. The reversal of 208285890 is 98582802.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (208285897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45172 + ... + 49568.

It is an arithmetic number, because the mean of its divisors is an integer number (15634890).

Almost surely, 2^208285890 is an apocalyptic number.

208285890 is an abundant number, since it is smaller than the sum of its proper divisors (292030590).

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

208285890 is a wasteful number, since it uses less digits than its factorization.

208285890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5986.

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 208285890 is about 14432.1131508868. The cubic root of 208285890 is about 592.7705470987.

The spelling of 208285890 in words is "two hundred eight million, two hundred eighty-five thousand, eight hundred ninety".