689726120328 has 576 divisors, whose sum is σ = 2345234411520. Its totient is φ = 189145756800.

The previous prime is 689726120323. The next prime is 689726120357. The reversal of 689726120328 is 823021627986.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (689726120323) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 386833725 + ... + 386835507.

It is an arithmetic number, because the mean of its divisors is an integer number (4071587520).

Almost surely, 2^689726120328 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 689726120328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172617205760).

689726120328 is an abundant number, since it is smaller than the sum of its proper divisors (1655508291192).

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

689726120328 is a wasteful number, since it uses less digits than its factorization.

689726120328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980 (or 1957 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 689726120328 in words is "six hundred eighty-nine billion, seven hundred twenty-six million, one hundred twenty thousand, three hundred twenty-eight".