678408786 has 48 divisors (see below), whose sum is σ = 1630717920. Its totient is φ = 202090560.

The previous prime is 678408769. The next prime is 678408859. The reversal of 678408786 is 687804876.

678408786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17355 + ... + 40718.

It is an arithmetic number, because the mean of its divisors is an integer number (33973290).

Almost surely, 2^678408786 is an apocalyptic number.

678408786 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

678408786 is an abundant number, since it is smaller than the sum of its proper divisors (952309134).

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

678408786 is a wasteful number, since it uses less digits than its factorization.

678408786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58151 (or 58148 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The square root of 678408786 is about 26046.2816156165. The cubic root of 678408786 is about 878.6794872557.

The spelling of 678408786 in words is "six hundred seventy-eight million, four hundred eight thousand, seven hundred eighty-six".