678967740 has 144 divisors (see below), whose sum is σ = 2263847040. Its totient is φ = 163347840.

The previous prime is 678967727. The next prime is 678967763. The reversal of 678967740 is 47769876.

678967740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 273987 + ... + 276453.

It is an arithmetic number, because the mean of its divisors is an integer number (15721160).

Almost surely, 2^678967740 is an apocalyptic number.

678967740 is a gapful number since it is divisible by the number (60) 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 678967740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131923520).

678967740 is an abundant number, since it is smaller than the sum of its proper divisors (1584879300).

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

678967740 is a wasteful number, since it uses less digits than its factorization.

678967740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632 (or 2627 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The square root of 678967740 is about 26057.0094216508. The cubic root of 678967740 is about 878.9207412994.

It can be divided in two parts, 6789 and 67740, that added together give a square (74529 = 273²).

The spelling of 678967740 in words is "six hundred seventy-eight million, nine hundred sixty-seven thousand, seven hundred forty".