678049764 has 96 divisors (see below), whose sum is σ = 1839264000. Its totient is φ = 190425600.

The previous prime is 678049727. The next prime is 678049807. The reversal of 678049764 is 467940876.

678049764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1942662 + ... + 1943010.

It is an arithmetic number, because the mean of its divisors is an integer number (19159000).

Almost surely, 2^678049764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678049764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919632000).

678049764 is an abundant number, since it is smaller than the sum of its proper divisors (1161214236).

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

678049764 is a wasteful number, since it uses less digits than its factorization.

678049764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The square root of 678049764 is about 26039.3887025022. The cubic root of 678049764 is about 878.5244573587.

The spelling of 678049764 in words is "six hundred seventy-eight million, forty-nine thousand, seven hundred sixty-four".