489718538 has 4 divisors (see below), whose sum is σ = 734577810. Its totient is φ = 244859268.

The previous prime is 489718531. The next prime is 489718589. The reversal of 489718538 is 835817984.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 476417929 + 13300609 = 21827^2 + 3647^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 489718538.

It is not an unprimeable number, because it can be changed into a prime (489718531) 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 as a sum of consecutive naturals, namely, 122429633 + ... + 122429636.

Almost surely, 2^489718538 is an apocalyptic number.

489718538 is a deficient number, since it is larger than the sum of its proper divisors (244859272).

489718538 is a wasteful number, since it uses less digits than its factorization.

489718538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244859271.

The product of its digits is 1935360, while the sum is 53.

The square root of 489718538 is about 22129.5851294144. The cubic root of 489718538 is about 788.2225369316. Note that the first 3 decimals are identical.

The spelling of 489718538 in words is "four hundred eighty-nine million, seven hundred eighteen thousand, five hundred thirty-eight".