489685890 has 32 divisors (see below), whose sum is σ = 1189411776. Its totient is φ = 129008960.

The previous prime is 489685873. The next prime is 489685897. The reversal of 489685890 is 98586984.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 489685890.

It is not an unprimeable number, because it can be changed into a prime (489685897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95841 + ... + 100820.

It is an arithmetic number, because the mean of its divisors is an integer number (37169118).

Almost surely, 2^489685890 is an apocalyptic number.

489685890 is an abundant number, since it is smaller than the sum of its proper divisors (699725886).

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

489685890 is a wasteful number, since it uses less digits than its factorization.

489685890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196754.

The product of its (nonzero) digits is 4976640, while the sum is 57.

The square root of 489685890 is about 22128.8474620799. The cubic root of 489685890 is about 788.2050204337.

The spelling of 489685890 in words is "four hundred eighty-nine million, six hundred eighty-five thousand, eight hundred ninety".