678409424 has 40 divisors (see below), whose sum is σ = 1638758208. Its totient is φ = 264314880.

The previous prime is 678409379. The next prime is 678409439. The reversal of 678409424 is 424904876.

678409424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 274097 + ... + 276560.

Almost surely, 2^678409424 is an apocalyptic number.

It is an amenable number.

678409424 is an abundant number, since it is smaller than the sum of its proper divisors (960348784).

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

678409424 is a wasteful number, since it uses less digits than its factorization.

678409424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550683 (or 550677 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 678409424 is about 26046.2938630432. The cubic root of 678409424 is about 878.6797627028.

The spelling of 678409424 in words is "six hundred seventy-eight million, four hundred nine thousand, four hundred twenty-four".