678516 has 12 divisors (see below), whose sum is σ = 1583232. Its totient is φ = 226168.

The previous prime is 678499. The next prime is 678533. The reversal of 678516 is 615876.

678516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (678499) and next prime (678533).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

678516 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28260 + ... + 28283.

It is an arithmetic number, because the mean of its divisors is an integer number (131936).

2⁶⁷⁸⁵¹⁶ is an apocalyptic number.

It is an amenable number.

678516 is an abundant number, since it is smaller than the sum of its proper divisors (904716).

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

678516 is a wasteful number, since it uses less digits than its factorization.

678516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56550 (or 56548 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 678516 is about 823.7208264940. The cubic root of 678516 is about 87.8725772908.

The spelling of 678516 in words is "six hundred seventy-eight thousand, five hundred sixteen".