490771188 has 18 divisors (see below), whose sum is σ = 1240560594. Its totient is φ = 163590384.

The previous prime is 490771157. The next prime is 490771243. The reversal of 490771188 is 881177094.

490771188 is a `hidden beast` number, since 490 + 77 + 11 + 88 = 666.

It can be written as a sum of positive squares in only one way, i.e., 359026704 + 131744484 = 18948^2 + 11478^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6816231 + ... + 6816302.

It is an arithmetic number, because the mean of its divisors is an integer number (68920033).

Almost surely, 2^490771188 is an apocalyptic number.

It is an amenable number.

490771188 is an abundant number, since it is smaller than the sum of its proper divisors (749789406).

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

490771188 is a wasteful number, since it uses less digits than its factorization.

490771188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13632543 (or 13632538 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 490771188 is about 22153.3561340037. The cubic root of 490771188 is about 788.7868942116.

The spelling of 490771188 in words is "four hundred ninety million, seven hundred seventy-one thousand, one hundred eighty-eight".