688132816 has 20 divisors (see below), whose sum is σ = 1523722912. Its totient is φ = 294914016.

The previous prime is 688132811. The next prime is 688132829. The reversal of 688132816 is 618231886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688132811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3071910 + ... + 3072133.

Almost surely, 2^688132816 is an apocalyptic number.

It is an amenable number.

688132816 is an abundant number, since it is smaller than the sum of its proper divisors (835590096).

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

688132816 is a wasteful number, since it uses less digits than its factorization.

688132816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6144058 (or 6144052 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 688132816 is about 26232.2857562966. The cubic root of 688132816 is about 882.8577960507.

The spelling of 688132816 in words is "six hundred eighty-eight million, one hundred thirty-two thousand, eight hundred sixteen".