688016304 has 30 divisors (see below), whose sum is σ = 1925490476. Its totient is φ = 229338720.

The previous prime is 688016261. The next prime is 688016309. The reversal of 688016304 is 403610886.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (688016309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2388802 + ... + 2389089.

Almost surely, 2^688016304 is an apocalyptic number.

It is an amenable number.

688016304 is an abundant number, since it is smaller than the sum of its proper divisors (1237474172).

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

688016304 is a wasteful number, since it uses less digits than its factorization.

688016304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4777905 (or 4777896 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 688016304 is about 26230.0648874531. The cubic root of 688016304 is about 882.8079658768.

The spelling of 688016304 in words is "six hundred eighty-eight million, sixteen thousand, three hundred four".