688486216 has 32 divisors (see below), whose sum is σ = 1456833600. Its totient is φ = 302155840.

The previous prime is 688486207. The next prime is 688486217. The reversal of 688486216 is 612684886.

It is a self number, because there is not a number n which added to its sum of digits gives 688486216.

It is not an unprimeable number, because it can be changed into a prime (688486217) by changing a digit.

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, 132340 + ... + 137443.

It is an arithmetic number, because the mean of its divisors is an integer number (45526050).

Almost surely, 2^688486216 is an apocalyptic number.

It is an amenable number.

688486216 is an abundant number, since it is smaller than the sum of its proper divisors (768347384).

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

688486216 is a wasteful number, since it uses less digits than its factorization.

688486216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269829 (or 269825 counting only the distinct ones).

The product of its digits is 884736, while the sum is 49.

The square root of 688486216 is about 26239.0208658784. The cubic root of 688486216 is about 883.0089047428.

The spelling of 688486216 in words is "six hundred eighty-eight million, four hundred eighty-six thousand, two hundred sixteen".