487840 has 24 divisors (see below), whose sum is σ = 1152900. Its totient is φ = 195072.

The previous prime is 487831. The next prime is 487843. The reversal of 487840 is 48784.

487840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 446224 + 41616 = 668^2 + 204^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1365 + ... + 1684.

2⁴⁸⁷⁸⁴⁰ is an apocalyptic number.

487840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

487840 is an abundant number, since it is smaller than the sum of its proper divisors (665060).

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

487840 is a wasteful number, since it uses less digits than its factorization.

487840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064 (or 3056 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 487840 is about 698.4554388077. The cubic root of 487840 is about 78.7213383561.

The spelling of 487840 in words is "four hundred eighty-seven thousand, eight hundred forty".