678311922 has 16 divisors (see below), whose sum is σ = 1361905632. Its totient is φ = 225223680.

The previous prime is 678311869. The next prime is 678311923. The reversal of 678311922 is 229113876.

It is not an unprimeable number, because it can be changed into a prime (678311923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218404 + ... + 221487.

It is an arithmetic number, because the mean of its divisors is an integer number (85119102).

Almost surely, 2^678311922 is an apocalyptic number.

678311922 is an abundant number, since it is smaller than the sum of its proper divisors (683593710).

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

678311922 is a wasteful number, since it uses less digits than its factorization.

678311922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440153.

The product of its digits is 36288, while the sum is 39.

The square root of 678311922 is about 26044.4220899601. The cubic root of 678311922 is about 878.6376656368.

The spelling of 678311922 in words is "six hundred seventy-eight million, three hundred eleven thousand, nine hundred twenty-two".