679284 has 18 divisors (see below), whose sum is σ = 1717170. Its totient is φ = 226416.

The previous prime is 679279. The next prime is 679297. The reversal of 679284 is 482976.

It can be written as a sum of positive squares in only one way, i.e., 675684 + 3600 = 822^2 + 60^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×679284² = 922853505312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 18869 = 679284 / (6 + 7 + 9 + 2 + 8 + 4).

It is a d-powerful number, because it can be written as 6² + 7³ + 2¹⁷ + 9⁶ + 8 + 4⁷ .

It is a congruent number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 9399 + ... + 9470.

2⁶⁷⁹²⁸⁴ is an apocalyptic number.

It is an amenable number.

679284 is an abundant number, since it is smaller than the sum of its proper divisors (1037886).

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

679284 is a wasteful number, since it uses less digits than its factorization.

679284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18879 (or 18874 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 679284 is about 824.1868720139. The cubic root of 679284 is about 87.9057185841.

The spelling of 679284 in words is "six hundred seventy-nine thousand, two hundred eighty-four".