679240 has 16 divisors (see below), whose sum is σ = 1528380. Its totient is φ = 271680.

The previous prime is 679229. The next prime is 679249. The reversal of 679240 is 42976.

It can be written as a sum of positive squares in 2 ways, for example, as 636804 + 42436 = 798^2 + 206^2 .

It is a super-2 number, since 2×679240² = 922733955200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 679199 and 679208.

It is not an unprimeable number, because it can be changed into a prime (679249) by changing a digit.

679240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8451 + ... + 8530.

2⁶⁷⁹²⁴⁰ is an apocalyptic number.

It is an amenable number.

679240 is an abundant number, since it is smaller than the sum of its proper divisors (849140).

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

679240 is a wasteful number, since it uses less digits than its factorization.

679240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16992 (or 16988 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 679240 is about 824.1601786061. The cubic root of 679240 is about 87.9038205389.

It can be divided in two parts, 679 and 240, that added together give a palindrome (919).

The spelling of 679240 in words is "six hundred seventy-nine thousand, two hundred forty".