689790 has 16 divisors (see below), whose sum is σ = 1655568. Its totient is φ = 183936.

The previous prime is 689789. The next prime is 689797. The reversal of 689790 is 97986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11467 + ... + 11526.

It is an arithmetic number, because the mean of its divisors is an integer number (103473).

2⁶⁸⁹⁷⁹⁰ is an apocalyptic number.

689790 is an abundant number, since it is smaller than the sum of its proper divisors (965778).

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

689790 is a wasteful number, since it uses less digits than its factorization.

689790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23003.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 689790 is about 830.5359715268. The cubic root of 689790 is about 88.3565936925.

The spelling of 689790 in words is "six hundred eighty-nine thousand, seven hundred ninety".