678945084 has 12 divisors (see below), whose sum is σ = 1584205224. Its totient is φ = 226315024.

The previous prime is 678945077. The next prime is 678945101. The reversal of 678945084 is 480549876.

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.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28289367 + ... + 28289390.

It is an arithmetic number, because the mean of its divisors is an integer number (132017102).

Almost surely, 2^678945084 is an apocalyptic number.

It is an amenable number.

678945084 is an abundant number, since it is smaller than the sum of its proper divisors (905260140).

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

678945084 is a wasteful number, since it uses less digits than its factorization.

678945084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56578764 (or 56578762 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The square root of 678945084 is about 26056.5746789558. The cubic root of 678945084 is about 878.9109651600.

The spelling of 678945084 in words is "six hundred seventy-eight million, nine hundred forty-five thousand, eighty-four".