689432544 has 288 divisors, whose sum is σ = 2195968320. Its totient is φ = 204374016.

The previous prime is 689432543. The next prime is 689432551. The reversal of 689432544 is 445234986.

689432544 is a `hidden beast` number, since 68 + 9 + 43 + 2 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a self number, because there is not a number n which added to its sum of digits gives 689432544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689432543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7107504 + ... + 7107600.

It is an arithmetic number, because the mean of its divisors is an integer number (7624890).

Almost surely, 2^689432544 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 689432544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097984160).

689432544 is an abundant number, since it is smaller than the sum of its proper divisors (1506535776).

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

689432544 is a wasteful number, since it uses less digits than its factorization.

689432544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 191 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 689432544 is about 26257.0475110969. The cubic root of 689432544 is about 883.4132863511.

The spelling of 689432544 in words is "six hundred eighty-nine million, four hundred thirty-two thousand, five hundred forty-four".