689043564 has 96 divisors (see below), whose sum is σ = 1954041600. Its totient is φ = 208241280.

The previous prime is 689043559. The next prime is 689043571. The reversal of 689043564 is 465340986.

689043564 is a `hidden beast` number, since 6 + 89 + 0 + 4 + 3 + 564 = 666.

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, 734904 + ... + 735840.

It is an arithmetic number, because the mean of its divisors is an integer number (20354600).

Almost surely, 2^689043564 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 689043564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (977020800).

689043564 is an abundant number, since it is smaller than the sum of its proper divisors (1264998036).

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

689043564 is a wasteful number, since it uses less digits than its factorization.

689043564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 689043564 is about 26249.6393118077. The cubic root of 689043564 is about 883.2471135814.

The spelling of 689043564 in words is "six hundred eighty-nine million, forty-three thousand, five hundred sixty-four".