689266980 has 72 divisors (see below), whose sum is σ = 2106808704. Its totient is φ = 182395200.

The previous prime is 689266913. The next prime is 689266987. The reversal of 689266980 is 89662986.

It is not an unprimeable number, because it can be changed into a prime (689266987) 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 23 ways as a sum of consecutive naturals, for example, 8965 + ... + 38195.

It is an arithmetic number, because the mean of its divisors is an integer number (29261232).

Almost surely, 2^689266980 is an apocalyptic number.

689266980 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 689266980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053404352).

689266980 is an abundant number, since it is smaller than the sum of its proper divisors (1417541724).

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

689266980 is a wasteful number, since it uses less digits than its factorization.

689266980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29377 (or 29372 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The square root of 689266980 is about 26253.8945682350. The cubic root of 689266980 is about 883.3425648337.

The spelling of 689266980 in words is "six hundred eighty-nine million, two hundred sixty-six thousand, nine hundred eighty".