688196 has 6 divisors (see below), whose sum is σ = 1204350. Its totient is φ = 344096.

The previous prime is 688187. The next prime is 688201. The reversal of 688196 is 691886.

It can be written as a sum of positive squares in only one way, i.e., 662596 + 25600 = 814^2 + 160^2 .

It is a super-2 number, since 2×688196² = 947227468832, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86021 + ... + 86028.

It is an arithmetic number, because the mean of its divisors is an integer number (200725).

2⁶⁸⁸¹⁹⁶ is an apocalyptic number.

It is an amenable number.

688196 is a deficient number, since it is larger than the sum of its proper divisors (516154).

688196 is a wasteful number, since it uses less digits than its factorization.

688196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172053 (or 172051 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 688196 is about 829.5757952110. The cubic root of 688196 is about 88.2884816406.

The spelling of 688196 in words is "six hundred eighty-eight thousand, one hundred ninety-six".