687484780 has 24 divisors (see below), whose sum is σ = 1458016560. Its totient is φ = 272270400.

The previous prime is 687484747. The next prime is 687484801. The reversal of 687484780 is 87484786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168150 + ... + 172189.

It is an arithmetic number, because the mean of its divisors is an integer number (60750690).

Almost surely, 2^687484780 is an apocalyptic number.

It is an amenable number.

687484780 is an abundant number, since it is smaller than the sum of its proper divisors (770531780).

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

687484780 is a wasteful number, since it uses less digits than its factorization.

687484780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340449 (or 340447 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 52.

The square root of 687484780 is about 26219.9309686353. The cubic root of 687484780 is about 882.5805708257.

The spelling of 687484780 in words is "six hundred eighty-seven million, four hundred eighty-four thousand, seven hundred eighty".