487809 has 32 divisors (see below), whose sum is σ = 864000. Its totient is φ = 266112.

The previous prime is 487793. The next prime is 487811. The reversal of 487809 is 908784.

487809 = T₅₇ + T₅₈ + ... + T₁₄₅.

It is not a de Polignac number, because 487809 - 2⁴ = 487793 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (487819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5437 + ... + 5525.

It is an arithmetic number, because the mean of its divisors is an integer number (27000).

2⁴⁸⁷⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

487809 is a deficient number, since it is larger than the sum of its proper divisors (376191).

487809 is a wasteful number, since it uses less digits than its factorization.

487809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 487809 is about 698.4332466313. The cubic root of 487809 is about 78.7196708605.

It can be divided in two parts, 487 and 809, that added together give a 4-th power (1296 = 6⁴).

The spelling of 487809 in words is "four hundred eighty-seven thousand, eight hundred nine".