208671090 has 64 divisors (see below), whose sum is σ = 531930240. Its totient is φ = 52208640.

The previous prime is 208671049. The next prime is 208671119. The reversal of 208671090 is 90176802.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 315360 + ... + 316020.

It is an arithmetic number, because the mean of its divisors is an integer number (8311410).

Almost surely, 2^208671090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208671090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265965120).

208671090 is an abundant number, since it is smaller than the sum of its proper divisors (323259150).

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

208671090 is a wasteful number, since it uses less digits than its factorization.

208671090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 208671090 is about 14445.4522255276. The cubic root of 208671090 is about 593.1357416231.

The spelling of 208671090 in words is "two hundred eight million, six hundred seventy-one thousand, ninety".