688454716 has 12 divisors (see below), whose sum is σ = 1225216440. Its totient is φ = 338392880.

The previous prime is 688454713. The next prime is 688454717. The reversal of 688454716 is 617454886.

It is a self number, because there is not a number n which added to its sum of digits gives 688454716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688454713) 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, 1458355 + ... + 1458826.

It is an arithmetic number, because the mean of its divisors is an integer number (102101370).

Almost surely, 2^688454716 is an apocalyptic number.

It is an amenable number.

688454716 is a deficient number, since it is larger than the sum of its proper divisors (536761724).

688454716 is a wasteful number, since it uses less digits than its factorization.

688454716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917244 (or 2917242 counting only the distinct ones).

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

The square root of 688454716 is about 26238.4206079558. The cubic root of 688454716 is about 882.9954379010.

The spelling of 688454716 in words is "six hundred eighty-eight million, four hundred fifty-four thousand, seven hundred sixteen".