688312896 has 56 divisors (see below), whose sum is σ = 1828068480. Its totient is φ = 228567552.

The previous prime is 688312861. The next prime is 688312901. The reversal of 688312896 is 698213886.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44985 + ... + 58311.

It is an arithmetic number, because the mean of its divisors is an integer number (32644080).

Almost surely, 2^688312896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 688312896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914034240).

688312896 is an abundant number, since it is smaller than the sum of its proper divisors (1139755584).

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

688312896 is a wasteful number, since it uses less digits than its factorization.

688312896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13611 (or 13601 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 688312896 is about 26235.7179432925. The cubic root of 688312896 is about 882.9348020984.

The spelling of 688312896 in words is "six hundred eighty-eight million, three hundred twelve thousand, eight hundred ninety-six".