678404896 has 24 divisors (see below), whose sum is σ = 1438349724. Its totient is φ = 313109760.

The previous prime is 678404887. The next prime is 678404911. The reversal of 678404896 is 698404876.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 568154896 + 110250000 = 23836^2 + 10500^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 814975 + ... + 815806.

Almost surely, 2^678404896 is an apocalyptic number.

It is an amenable number.

678404896 is an abundant number, since it is smaller than the sum of its proper divisors (759944828).

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

678404896 is a wasteful number, since it uses less digits than its factorization.

678404896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630804 (or 1630796 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The square root of 678404896 is about 26046.2069407428. The cubic root of 678404896 is about 878.6778078013.

The spelling of 678404896 in words is "six hundred seventy-eight million, four hundred four thousand, eight hundred ninety-six".