688813308 has 60 divisors (see below), whose sum is σ = 1895484360. Its totient is φ = 217518048.

The previous prime is 688813283. The next prime is 688813313. The reversal of 688813308 is 803318886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49791 + ... + 62102.

It is an arithmetic number, because the mean of its divisors is an integer number (31591406).

Almost surely, 2^688813308 is an apocalyptic number.

It is an amenable number.

688813308 is an abundant number, since it is smaller than the sum of its proper divisors (1206671052).

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

688813308 is a wasteful number, since it uses less digits than its factorization.

688813308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111928 (or 111917 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 688813308 is about 26245.2530565053. The cubic root of 688813308 is about 883.1487184456.

The spelling of 688813308 in words is "six hundred eighty-eight million, eight hundred thirteen thousand, three hundred eight".