679830 has 64 divisors (see below), whose sum is σ = 1824768. Its totient is φ = 161280.

The previous prime is 679829. The next prime is 679837. The reversal of 679830 is 38976.

679830 = 44² + 45² + ... + 128².

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 679791 and 679800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15789 + ... + 15831.

It is an arithmetic number, because the mean of its divisors is an integer number (28512).

2⁶⁷⁹⁸³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (912384).

679830 is an abundant number, since it is smaller than the sum of its proper divisors (1144938).

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

679830 is a wasteful number, since it uses less digits than its factorization.

679830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 679830 is about 824.5180410397. The cubic root of 679830 is about 87.9292647830.

The spelling of 679830 in words is "six hundred seventy-nine thousand, eight hundred thirty".