688752616 has 8 divisors (see below), whose sum is σ = 1291411170. Its totient is φ = 344376304.

The previous prime is 688752601. The next prime is 688752643. The reversal of 688752616 is 616257886.

It can be written as a sum of positive squares in only one way, i.e., 649740100 + 39012516 = 25490^2 + 6246^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 688752616.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43047031 + ... + 43047046.

Almost surely, 2^688752616 is an apocalyptic number.

It is an amenable number.

688752616 is a deficient number, since it is larger than the sum of its proper divisors (602658554).

688752616 is a wasteful number, since it uses less digits than its factorization.

688752616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86094083 (or 86094079 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 688752616 is about 26244.0967838484. The cubic root of 688752616 is about 883.1227793240.

The spelling of 688752616 in words is "six hundred eighty-eight million, seven hundred fifty-two thousand, six hundred sixteen".