678869784 has 48 divisors (see below), whose sum is σ = 1888305120. Its totient is φ = 220173120.

The previous prime is 678869743. The next prime is 678869797. The reversal of 678869784 is 487968876.

678869784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124752 + ... + 130079.

It is an arithmetic number, because the mean of its divisors is an integer number (39339690).

Almost surely, 2^678869784 is an apocalyptic number.

It is an amenable number.

678869784 is an abundant number, since it is smaller than the sum of its proper divisors (1209435336).

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

678869784 is a wasteful number, since it uses less digits than its factorization.

678869784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254880 (or 254873 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The square root of 678869784 is about 26055.1297060675. The cubic root of 678869784 is about 878.8784713968.

The spelling of 678869784 in words is "six hundred seventy-eight million, eight hundred sixty-nine thousand, seven hundred eighty-four".