689847648 has 96 divisors (see below), whose sum is σ = 2159571456. Its totient is φ = 188525568.

The previous prime is 689847643. The next prime is 689847659. The reversal of 689847648 is 846748986.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×689847648² = 951779554902263808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 689847591 and 689847600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689847643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6861 + ... + 37772.

It is an arithmetic number, because the mean of its divisors is an integer number (22495536).

Almost surely, 2^689847648 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 689847648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079785728).

689847648 is an abundant number, since it is smaller than the sum of its proper divisors (1469723808).

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

689847648 is a wasteful number, since it uses less digits than its factorization.

689847648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44676 (or 44668 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 60.

The square root of 689847648 is about 26264.9509422729. The cubic root of 689847648 is about 883.5905504015.

The spelling of 689847648 in words is "six hundred eighty-nine million, eight hundred forty-seven thousand, six hundred forty-eight".