688298268 has 96 divisors (see below), whose sum is σ = 1883879424. Its totient is φ = 191513088.

The previous prime is 688298263. The next prime is 688298269. The reversal of 688298268 is 862892886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688298263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1235446 + ... + 1236002.

It is an arithmetic number, because the mean of its divisors is an integer number (19623744).

Almost surely, 2^688298268 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 688298268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (941939712).

688298268 is an abundant number, since it is smaller than the sum of its proper divisors (1195581156).

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

688298268 is a wasteful number, since it uses less digits than its factorization.

688298268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931 (or 929 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 57.

The square root of 688298268 is about 26235.4391615616. The cubic root of 688298268 is about 882.9285473550.

The spelling of 688298268 in words is "six hundred eighty-eight million, two hundred ninety-eight thousand, two hundred sixty-eight".