688346632 has 8 divisors (see below), whose sum is σ = 1290649950. Its totient is φ = 344173312.

The previous prime is 688346621. The next prime is 688346641. The reversal of 688346632 is 236643886.

It can be written as a sum of positive squares in only one way, i.e., 541306756 + 147039876 = 23266^2 + 12126^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43021657 + ... + 43021672.

Almost surely, 2^688346632 is an apocalyptic number.

It is an amenable number.

688346632 is a deficient number, since it is larger than the sum of its proper divisors (602303318).

688346632 is a wasteful number, since it uses less digits than its factorization.

688346632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86043335 (or 86043331 counting only the distinct ones).

The product of its digits is 995328, while the sum is 46.

The square root of 688346632 is about 26236.3608757007. The cubic root of 688346632 is about 882.9492268376.

It can be divided in two parts, 68834 and 6632, that added together give a triangular number (75466 = T₃₈₈).

The spelling of 688346632 in words is "six hundred eighty-eight million, three hundred forty-six thousand, six hundred thirty-two".