688396 has 12 divisors (see below), whose sum is σ = 1216152. Its totient is φ = 340928.

The previous prime is 688393. The next prime is 688397. The reversal of 688396 is 693886.

It is not an unprimeable number, because it can be changed into a prime (688393) 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, 310 + ... + 1213.

It is an arithmetic number, because the mean of its divisors is an integer number (101346).

2⁶⁸⁸³⁹⁶ is an apocalyptic number.

It is an amenable number.

688396 is a deficient number, since it is larger than the sum of its proper divisors (527756).

688396 is a wasteful number, since it uses less digits than its factorization.

688396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1638 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 688396 is about 829.6963299907. The cubic root of 688396 is about 88.2970334612.

It can be divided in two parts, 68 and 8396, that added together give a square (8464 = 92²).

The spelling of 688396 in words is "six hundred eighty-eight thousand, three hundred ninety-six".