698688 has 42 divisors (see below), whose sum is σ = 2004314. Its totient is φ = 232704.

The previous prime is 698669. The next prime is 698701. The reversal of 698688 is 886896.

It can be written as a sum of positive squares in only one way, i.e., 419904 + 278784 = 648^2 + 528^2 .

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 4 and base 16.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

698688 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31 + ... + 1182.

2⁶⁹⁸⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002157).

698688 is an abundant number, since it is smaller than the sum of its proper divisors (1305626).

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

698688 is a wasteful number, since it uses less digits than its factorization.

698688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231 (or 1218 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 698688 is about 835.8755888289. The cubic root of 698688 is about 88.7348926213.

The spelling of 698688 in words is "six hundred ninety-eight thousand, six hundred eighty-eight".