689402580 has 96 divisors (see below), whose sum is σ = 1985679360. Its totient is φ = 178627200.

The previous prime is 689402579. The next prime is 689402599. The reversal of 689402580 is 85204986.

689402580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 425011 + ... + 426629.

It is an arithmetic number, because the mean of its divisors is an integer number (20684160).

Almost surely, 2^689402580 is an apocalyptic number.

689402580 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 689402580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992839680).

689402580 is an abundant number, since it is smaller than the sum of its proper divisors (1296276780).

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

689402580 is a wasteful number, since it uses less digits than its factorization.

689402580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829 (or 1827 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 689402580 is about 26256.4769152299. The cubic root of 689402580 is about 883.4004879130.

The spelling of 689402580 in words is "six hundred eighty-nine million, four hundred two thousand, five hundred eighty".