689241984 has 64 divisors (see below), whose sum is σ = 1838350080. Its totient is φ = 228800000.

The previous prime is 689241979. The next prime is 689242007. The reversal of 689241984 is 489142986.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92809 + ... + 99959.

It is an arithmetic number, because the mean of its divisors is an integer number (28724220).

Almost surely, 2^689241984 is an apocalyptic number.

689241984 is a gapful number since it is divisible by the number (64) 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 689241984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919175040).

689241984 is an abundant number, since it is smaller than the sum of its proper divisors (1149108096).

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

689241984 is a wasteful number, since it uses less digits than its factorization.

689241984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7419 (or 7407 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 689241984 is about 26253.4185202613. The cubic root of 689241984 is about 883.3318866793.

The spelling of 689241984 in words is "six hundred eighty-nine million, two hundred forty-one thousand, nine hundred eighty-four".