689264 has 20 divisors (see below), whose sum is σ = 1394256. Its totient is φ = 329472.

The previous prime is 689261. The next prime is 689267. The reversal of 689264 is 462986.

It is an interprime number because it is at equal distance from previous prime (689261) and next prime (689267).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689261) 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, 569 + ... + 1304.

2⁶⁸⁹²⁶⁴ is an apocalyptic number.

It is an amenable number.

689264 is an abundant number, since it is smaller than the sum of its proper divisors (704992).

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

689264 is a wasteful number, since it uses less digits than its factorization.

689264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904 (or 1898 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 689264 is about 830.2192481508. The cubic root of 689264 is about 88.3341291808.

The spelling of 689264 in words is "six hundred eighty-nine thousand, two hundred sixty-four".