678940344 has 48 divisors (see below), whose sum is σ = 1902209400. Its totient is φ = 218508864.

The previous prime is 678940313. The next prime is 678940351. The reversal of 678940344 is 443049876.

It is a self number, because there is not a number n which added to its sum of digits gives 678940344.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 160494 + ... + 164669.

Almost surely, 2^678940344 is an apocalyptic number.

It is an amenable number.

678940344 is an abundant number, since it is smaller than the sum of its proper divisors (1223269056).

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

678940344 is a wasteful number, since it uses less digits than its factorization.

678940344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325204 (or 325197 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 678940344 is about 26056.4837228664. The cubic root of 678940344 is about 878.9089198068.

The spelling of 678940344 in words is "six hundred seventy-eight million, nine hundred forty thousand, three hundred forty-four".