689717928 has 32 divisors (see below), whose sum is σ = 1799265600. Its totient is φ = 219909888.

The previous prime is 689717921. The next prime is 689717929. The reversal of 689717928 is 829717986.

It is a super-2 number, since 2×689717928² = 951421640409226368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (689717921) 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, 624193 + ... + 625296.

It is an arithmetic number, because the mean of its divisors is an integer number (56227050).

Almost surely, 2^689717928 is an apocalyptic number.

It is an amenable number.

689717928 is an abundant number, since it is smaller than the sum of its proper divisors (1109547672).

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

689717928 is a wasteful number, since it uses less digits than its factorization.

689717928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249521 (or 1249517 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 57.

The square root of 689717928 is about 26262.4813755289. The cubic root of 689717928 is about 883.5351630263.

The spelling of 689717928 in words is "six hundred eighty-nine million, seven hundred seventeen thousand, nine hundred twenty-eight".