489221985 has 16 divisors (see below), whose sum is σ = 894577536. Its totient is φ = 223644288.

The previous prime is 489221939. The next prime is 489221987. The reversal of 489221985 is 589122984.

It is not a de Polignac number, because 489221985 - 2⁶ = 489221921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (489221987) 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, 2329524 + ... + 2329733.

It is an arithmetic number, because the mean of its divisors is an integer number (55911096).

Almost surely, 2^489221985 is an apocalyptic number.

It is an amenable number.

489221985 is a deficient number, since it is larger than the sum of its proper divisors (405355551).

489221985 is a wasteful number, since it uses less digits than its factorization.

489221985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659272.

The product of its digits is 414720, while the sum is 48.

The square root of 489221985 is about 22118.3630723433. The cubic root of 489221985 is about 787.9560392089.

Subtracting 489221985 from its reverse (589122984), we obtain a palindrome (99900999).

The spelling of 489221985 in words is "four hundred eighty-nine million, two hundred twenty-one thousand, nine hundred eighty-five".