689656080 has 160 divisors (see below), whose sum is σ = 2213608320. Its totient is φ = 177500160.

The previous prime is 689656031. The next prime is 689656103. The reversal of 689656080 is 80656986.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1072239 + ... + 1072881.

It is an arithmetic number, because the mean of its divisors is an integer number (13835052).

Almost surely, 2^689656080 is an apocalyptic number.

689656080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689656080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1106804160).

689656080 is an abundant number, since it is smaller than the sum of its proper divisors (1523952240).

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

689656080 is a wasteful number, since it uses less digits than its factorization.

689656080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 689656080 is about 26261.3038518654. The cubic root of 689656080 is about 883.5087529467.

The spelling of 689656080 in words is "six hundred eighty-nine million, six hundred fifty-six thousand, eighty".