678616 has 8 divisors (see below), whose sum is σ = 1272420. Its totient is φ = 339304.

The previous prime is 678611. The next prime is 678631. The reversal of 678616 is 616876.

678616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42406 + ... + 42421.

2⁶⁷⁸⁶¹⁶ is an apocalyptic number.

It is an amenable number.

678616 is a deficient number, since it is larger than the sum of its proper divisors (593804).

678616 is a wasteful number, since it uses less digits than its factorization.

678616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84833 (or 84829 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 678616 is about 823.7815244347. The cubic root of 678616 is about 87.8768939791.

The spelling of 678616 in words is "six hundred seventy-eight thousand, six hundred sixteen".