678780500 has 24 divisors (see below), whose sum is σ = 1482457704. Its totient is φ = 271512000.

The previous prime is 678780497. The next prime is 678780511. The reversal of 678780500 is 5087876.

678780500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2676496 + 676104004 = 1636^2 + 26002^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678281 + ... + 679280.

It is an arithmetic number, because the mean of its divisors is an integer number (61769071).

Almost surely, 2^678780500 is an apocalyptic number.

It is an amenable number.

678780500 is an abundant number, since it is smaller than the sum of its proper divisors (803677204).

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

678780500 is a wasteful number, since it uses less digits than its factorization.

678780500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357580 (or 1357568 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 678780500 is about 26053.4162827066. The cubic root of 678780500 is about 878.8399400870.

The spelling of 678780500 in words is "six hundred seventy-eight million, seven hundred eighty thousand, five hundred".