678414472 has 8 divisors (see below), whose sum is σ = 1272027150. Its totient is φ = 339207232.

The previous prime is 678414439. The next prime is 678414479. The reversal of 678414472 is 274414876.

It can be written as a sum of positive squares in only one way, i.e., 518290756 + 160123716 = 22766^2 + 12654^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (678414479) 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 as a sum of consecutive naturals, namely, 42400897 + ... + 42400912.

Almost surely, 2^678414472 is an apocalyptic number.

It is an amenable number.

678414472 is a deficient number, since it is larger than the sum of its proper divisors (593612678).

678414472 is a wasteful number, since it uses less digits than its factorization.

678414472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84801815 (or 84801811 counting only the distinct ones).

The product of its digits is 301056, while the sum is 43.

The square root of 678414472 is about 26046.3907672445. The cubic root of 678414472 is about 878.6819420969.

The spelling of 678414472 in words is "six hundred seventy-eight million, four hundred fourteen thousand, four hundred seventy-two".