678286380 has 24 divisors (see below), whose sum is σ = 1899202032. Its totient is φ = 180876352.

The previous prime is 678286369. The next prime is 678286381. The reversal of 678286380 is 83682876.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (678286381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5652327 + ... + 5652446.

It is an arithmetic number, because the mean of its divisors is an integer number (79133418).

Almost surely, 2^678286380 is an apocalyptic number.

678286380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

678286380 is an abundant number, since it is smaller than the sum of its proper divisors (1220915652).

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

678286380 is a wasteful number, since it uses less digits than its factorization.

678286380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11304785 (or 11304783 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 678286380 is about 26043.9317308274. The cubic root of 678286380 is about 878.6266370602.

The spelling of 678286380 in words is "six hundred seventy-eight million, two hundred eighty-six thousand, three hundred eighty".