678143424 has 224 divisors, whose sum is σ = 2153594880. Its totient is φ = 184246272.

The previous prime is 678143371. The next prime is 678143483. The reversal of 678143424 is 424341876.

It is a tau number, because it is divible by the number of its divisors (224).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 4949884 + ... + 4950020.

Almost surely, 2^678143424 is an apocalyptic number.

678143424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678143424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1076797440).

678143424 is an abundant number, since it is smaller than the sum of its proper divisors (1475451456).

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

678143424 is a wasteful number, since it uses less digits than its factorization.

678143424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 305 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 678143424 is about 26041.1870697171. The cubic root of 678143424 is about 878.5649061167.

It can be divided in two parts, 6781 and 43424, that added together give a palindrome (50205).

The spelling of 678143424 in words is "six hundred seventy-eight million, one hundred forty-three thousand, four hundred twenty-four".