680424 has 16 divisors (see below), whose sum is σ = 1701120. Its totient is φ = 226800.

The previous prime is 680417. The next prime is 680431. The reversal of 680424 is 424086.

It is an interprime number because it is at equal distance from previous prime (680417) and next prime (680431).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 28351 = 680424 / (6 + 8 + 0 + 4 + 2 + 4).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 680394 and 680403.

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, 14152 + ... + 14199.

It is an arithmetic number, because the mean of its divisors is an integer number (106320).

2⁶⁸⁰⁴²⁴ is an apocalyptic number.

It is an amenable number.

680424 is an abundant number, since it is smaller than the sum of its proper divisors (1020696).

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

680424 is a wasteful number, since it uses less digits than its factorization.

680424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28360 (or 28356 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 680424 is about 824.8781728231. The cubic root of 680424 is about 87.9548666632.

The spelling of 680424 in words is "six hundred eighty thousand, four hundred twenty-four".