489517815 has 16 divisors (see below), whose sum is σ = 792667008. Its totient is φ = 257930016.

The previous prime is 489517799. The next prime is 489517823. The reversal of 489517815 is 518715984.

It is a happy number.

It is not a de Polignac number, because 489517815 - 2⁴ = 489517799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195349 + ... + 197838.

It is an arithmetic number, because the mean of its divisors is an integer number (49541688).

Almost surely, 2^489517815 is an apocalyptic number.

489517815 is a deficient number, since it is larger than the sum of its proper divisors (303149193).

489517815 is a wasteful number, since it uses less digits than its factorization.

489517815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393278.

The product of its digits is 403200, while the sum is 48.

The square root of 489517815 is about 22125.0494914701. The cubic root of 489517815 is about 788.1148315179.

The spelling of 489517815 in words is "four hundred eighty-nine million, five hundred seventeen thousand, eight hundred fifteen".