688747008 has 80 divisors (see below), whose sum is σ = 1884611520. Its totient is φ = 223358976.

The previous prime is 688746997. The next prime is 688747019. The reversal of 688747008 is 800747886.

It is an interprime number because it is at equal distance from previous prime (688746997) and next prime (688747019).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 50773 + ... + 62891.

It is an arithmetic number, because the mean of its divisors is an integer number (23557644).

Almost surely, 2^688747008 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 688747008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (942305760).

688747008 is an abundant number, since it is smaller than the sum of its proper divisors (1195864512).

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

688747008 is a wasteful number, since it uses less digits than its factorization.

688747008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12177 (or 12161 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 48.

The square root of 688747008 is about 26243.9899405559. The cubic root of 688747008 is about 883.1203824470.

The spelling of 688747008 in words is "six hundred eighty-eight million, seven hundred forty-seven thousand, eight".