678449760 has 96 divisors (see below), whose sum is σ = 2194934112. Its totient is φ = 176025600.

The previous prime is 678449749. The next prime is 678449833. The reversal of 678449760 is 67944876.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1341 + ... + 36860.

It is an arithmetic number, because the mean of its divisors is an integer number (22863897).

Almost surely, 2^678449760 is an apocalyptic number.

678449760 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 678449760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097467056).

678449760 is an abundant number, since it is smaller than the sum of its proper divisors (1516484352).

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

678449760 is a wasteful number, since it uses less digits than its factorization.

678449760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38256 (or 38248 counting only the distinct ones).

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

The square root of 678449760 is about 26047.0681651506. The cubic root of 678449760 is about 878.6971768303.

The spelling of 678449760 in words is "six hundred seventy-eight million, four hundred forty-nine thousand, seven hundred sixty".