689078648 has 8 divisors (see below), whose sum is σ = 1292022480. Its totient is φ = 344539320.

The previous prime is 689078647. The next prime is 689078669. The reversal of 689078648 is 846870986.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 689078593 and 689078602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689078647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43067408 + ... + 43067423.

It is an arithmetic number, because the mean of its divisors is an integer number (161502810).

Almost surely, 2^689078648 is an apocalyptic number.

It is an amenable number.

689078648 is a deficient number, since it is larger than the sum of its proper divisors (602943832).

689078648 is a wasteful number, since it uses less digits than its factorization.

689078648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86134837 (or 86134833 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 56.

The square root of 689078648 is about 26250.3075791504. The cubic root of 689078648 is about 883.2621040781.

The spelling of 689078648 in words is "six hundred eighty-nine million, seventy-eight thousand, six hundred forty-eight".