678224450 has 54 divisors (see below), whose sum is σ = 1316865771. Its totient is φ = 259872480.

The previous prime is 678224389. The next prime is 678224461. The reversal of 678224450 is 54422876.

It can be written as a sum of positive squares in 5 ways, for example, as 260144641 + 418079809 = 16129^2 + 20447^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18415.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5340287 + ... + 5340413.

Almost surely, 2^678224450 is an apocalyptic number.

678224450 is a deficient number, since it is larger than the sum of its proper divisors (638641321).

678224450 is a wasteful number, since it uses less digits than its factorization.

678224450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 678224450 is about 26042.7427511005. The cubic root of 678224450 is about 878.5998956496.

The spelling of 678224450 in words is "six hundred seventy-eight million, two hundred twenty-four thousand, four hundred fifty".