678473440 has 96 divisors (see below), whose sum is σ = 1699778304. Its totient is φ = 255467520.

The previous prime is 678473407. The next prime is 678473449. The reversal of 678473440 is 44374876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678473449) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 181672 + ... + 185368.

It is an arithmetic number, because the mean of its divisors is an integer number (17706024).

Almost surely, 2^678473440 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 678473440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (849889152).

678473440 is an abundant number, since it is smaller than the sum of its proper divisors (1021304864).

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

678473440 is a wasteful number, since it uses less digits than its factorization.

678473440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780 (or 3772 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 43.

The square root of 678473440 is about 26047.5227229002. The cubic root of 678473440 is about 878.7073997965.

The spelling of 678473440 in words is "six hundred seventy-eight million, four hundred seventy-three thousand, four hundred forty".