678854780 has 24 divisors (see below), whose sum is σ = 1426160400. Its totient is φ = 271434240.

The previous prime is 678854779. The next prime is 678854783. The reversal of 678854780 is 87458876.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678854783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62171 + ... + 72269.

It is an arithmetic number, because the mean of its divisors is an integer number (59423350).

Almost surely, 2^678854780 is an apocalyptic number.

It is an amenable number.

678854780 is an abundant number, since it is smaller than the sum of its proper divisors (747305620).

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

678854780 is a wasteful number, since it uses less digits than its factorization.

678854780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13469 (or 13467 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 53.

The square root of 678854780 is about 26054.8417765298. The cubic root of 678854780 is about 878.8719965224.

The spelling of 678854780 in words is "six hundred seventy-eight million, eight hundred fifty-four thousand, seven hundred eighty".