678224 has 40 divisors (see below), whose sum is σ = 1458240. Its totient is φ = 304128.

The previous prime is 678221. The next prime is 678229. The reversal of 678224 is 422876.

678224 = T₄₇ + T₄₈ + ... + T₁₆₀.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6944 + ... + 7040.

It is an arithmetic number, because the mean of its divisors is an integer number (36456).

2⁶⁷⁸²²⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729120).

678224 is an abundant number, since it is smaller than the sum of its proper divisors (780016).

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

678224 is a wasteful number, since it uses less digits than its factorization.

678224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 141 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 678224 is about 823.5435629036. The cubic root of 678224 is about 87.8599701333.

The spelling of 678224 in words is "six hundred seventy-eight thousand, two hundred twenty-four".