678458684 has 24 divisors (see below), whose sum is σ = 1231458816. Its totient is φ = 326718000.

The previous prime is 678458681. The next prime is 678458689. The reversal of 678458684 is 486854876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678458681) 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, 13199 + ... + 39129.

It is an arithmetic number, because the mean of its divisors is an integer number (51310784).

Almost surely, 2^678458684 is an apocalyptic number.

It is an amenable number.

678458684 is a deficient number, since it is larger than the sum of its proper divisors (553000132).

678458684 is a wasteful number, since it uses less digits than its factorization.

678458684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26177 (or 26175 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 56.

The square root of 678458684 is about 26047.2394698555. The cubic root of 678458684 is about 878.7010294659.

The spelling of 678458684 in words is "six hundred seventy-eight million, four hundred fifty-eight thousand, six hundred eighty-four".