688345692 has 24 divisors (see below), whose sum is σ = 1612254336. Its totient is φ = 228575088.

The previous prime is 688345687. The next prime is 688345703. The reversal of 688345692 is 296543886.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105898 + ... + 112209.

It is an arithmetic number, because the mean of its divisors is an integer number (67177264).

Almost surely, 2^688345692 is an apocalyptic number.

It is an amenable number.

688345692 is an abundant number, since it is smaller than the sum of its proper divisors (923908644).

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

688345692 is a wasteful number, since it uses less digits than its factorization.

688345692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218377 (or 218375 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The square root of 688345692 is about 26236.3429616248. The cubic root of 688345692 is about 882.9488249215.

The spelling of 688345692 in words is "six hundred eighty-eight million, three hundred forty-five thousand, six hundred ninety-two".