687415468 has 24 divisors (see below), whose sum is σ = 1291689504. Its totient is φ = 318931200.

The previous prime is 687415439. The next prime is 687415481. The reversal of 687415468 is 864514786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66363 + ... + 76018.

It is an arithmetic number, because the mean of its divisors is an integer number (53820396).

Almost surely, 2^687415468 is an apocalyptic number.

687415468 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

687415468 is a deficient number, since it is larger than the sum of its proper divisors (604274036).

687415468 is a wasteful number, since it uses less digits than its factorization.

687415468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142473 (or 142471 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 49.

The square root of 687415468 is about 26218.6091927089. The cubic root of 687415468 is about 882.5509093300.

The spelling of 687415468 in words is "six hundred eighty-seven million, four hundred fifteen thousand, four hundred sixty-eight".