689026 has 8 divisors (see below), whose sum is σ = 1113084. Its totient is φ = 318000.

The previous prime is 689021. The next prime is 689033. The reversal of 689026 is 620986.

It can be written as a sum of positive squares in 2 ways, for example, as 638401 + 50625 = 799^2 + 225^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (689021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13225 + ... + 13276.

2⁶⁸⁹⁰²⁶ is an apocalyptic number.

689026 is a deficient number, since it is larger than the sum of its proper divisors (424058).

689026 is a wasteful number, since it uses less digits than its factorization.

689026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26516.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 689026 is about 830.0759001441. The cubic root of 689026 is about 88.3239608742.

The spelling of 689026 in words is "six hundred eighty-nine thousand, twenty-six".