678478380 has 48 divisors (see below), whose sum is σ = 1982340864. Its totient is φ = 173060800.

The previous prime is 678478331. The next prime is 678478397. The reversal of 678478380 is 83874876.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244446 + ... + 247205.

It is an arithmetic number, because the mean of its divisors is an integer number (41298768).

Almost surely, 2^678478380 is an apocalyptic number.

678478380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

678478380 is an abundant number, since it is smaller than the sum of its proper divisors (1303862484).

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

678478380 is a wasteful number, since it uses less digits than its factorization.

678478380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491686 (or 491684 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 51.

The square root of 678478380 is about 26047.6175494036. The cubic root of 678478380 is about 878.7095324293.

The spelling of 678478380 in words is "six hundred seventy-eight million, four hundred seventy-eight thousand, three hundred eighty".