678005216 has 96 divisors (see below), whose sum is σ = 1585059840. Its totient is φ = 279360000.

The previous prime is 678005213. The next prime is 678005219. The reversal of 678005216 is 612500876.

It is an interprime number because it is at equal distance from previous prime (678005213) and next prime (678005219).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678005213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1742750 + ... + 1743138.

It is an arithmetic number, because the mean of its divisors is an integer number (16511040).

Almost surely, 2^678005216 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 678005216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792529920).

678005216 is an abundant number, since it is smaller than the sum of its proper divisors (907054624).

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

678005216 is a wasteful number, since it uses less digits than its factorization.

678005216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 678005216 is about 26038.5332920270. The cubic root of 678005216 is about 878.5052171953.

The spelling of 678005216 in words is "six hundred seventy-eight million, five thousand, two hundred sixteen".