679648 has 24 divisors (see below), whose sum is σ = 1362312. Its totient is φ = 333696.

The previous prime is 679639. The next prime is 679669. The reversal of 679648 is 846976.

679648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 679648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1986 + ... + 2302.

It is an arithmetic number, because the mean of its divisors is an integer number (56763).

2⁶⁷⁹⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

679648 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

679648 is a wasteful number, since it uses less digits than its factorization.

679648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 386 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 679648 is about 824.4076661458. The cubic root of 679648 is about 87.9214174513.

It can be divided in two parts, 67 and 9648, that multiplied together give a square (646416 = 804²).

The spelling of 679648 in words is "six hundred seventy-nine thousand, six hundred forty-eight".