687903387628 has 12 divisors (see below), whose sum is σ = 1208867879520. Its totient is φ = 342512564912.

The previous prime is 687903387599. The next prime is 687903387631. The reversal of 687903387628 is 826783309786.

687903387628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×687903387628² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359781151 + ... + 359783062.

It is an arithmetic number, because the mean of its divisors is an integer number (100738989960).

Almost surely, 2^687903387628 is an apocalyptic number.

It is an amenable number.

687903387628 is a deficient number, since it is larger than the sum of its proper divisors (520964491892).

687903387628 is a wasteful number, since it uses less digits than its factorization.

687903387628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719564456 (or 719564454 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 67.

The spelling of 687903387628 in words is "six hundred eighty-seven billion, nine hundred three million, three hundred eighty-seven thousand, six hundred twenty-eight".