487644 has 12 divisors (see below), whose sum is σ = 1137864. Its totient is φ = 162544.

The previous prime is 487637. The next prime is 487649. The reversal of 487644 is 446784.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487649) 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 in 3 ways as a sum of consecutive naturals, for example, 20307 + ... + 20330.

It is an arithmetic number, because the mean of its divisors is an integer number (94822).

2⁴⁸⁷⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

487644 is an abundant number, since it is smaller than the sum of its proper divisors (650220).

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

487644 is a wasteful number, since it uses less digits than its factorization.

487644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40644 (or 40642 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 487644 is about 698.3151151164. The cubic root of 487644 is about 78.7107942917.

The spelling of 487644 in words is "four hundred eighty-seven thousand, six hundred forty-four".