688474448 has 20 divisors (see below), whose sum is σ = 1337507028. Its totient is φ = 343311360.

The previous prime is 688474441. The next prime is 688474453. The reversal of 688474448 is 844474886.

It can be written as a sum of positive squares in 2 ways, for example, as 508592704 + 179881744 = 22552^2 + 13412^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 688474448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688474441) 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, 51713 + ... + 63648.

Almost surely, 2^688474448 is an apocalyptic number.

It is an amenable number.

688474448 is a deficient number, since it is larger than the sum of its proper divisors (649032580).

688474448 is a wasteful number, since it uses less digits than its factorization.

688474448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115742 (or 115736 counting only the distinct ones).

The product of its digits is 5505024, while the sum is 53.

The square root of 688474448 is about 26238.7966187476. The cubic root of 688474448 is about 883.0038737498.

The spelling of 688474448 in words is "six hundred eighty-eight million, four hundred seventy-four thousand, four hundred forty-eight".