678824 has 16 divisors (see below), whose sum is σ = 1297620. Its totient is φ = 332800.

The previous prime is 678823. The next prime is 678829. The reversal of 678824 is 428876.

678824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 532900 + 145924 = 730^2 + 382^2 .

It is a super-3 number, since 3×678824³ = 938410417333980672, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (678823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377 + ... + 1224.

2⁶⁷⁸⁸²⁴ is an apocalyptic number.

It is an amenable number.

678824 is a deficient number, since it is larger than the sum of its proper divisors (618796).

678824 is a wasteful number, since it uses less digits than its factorization.

678824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660 (or 1656 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 678824 is about 823.9077618277. The cubic root of 678824 is about 87.8858713324.

The spelling of 678824 in words is "six hundred seventy-eight thousand, eight hundred twenty-four".