678345250 has 64 divisors (see below), whose sum is σ = 1400136192. Its totient is φ = 244032000.

The previous prime is 678345229. The next prime is 678345281. The reversal of 678345250 is 52543876.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265479 + ... + 268021.

It is an arithmetic number, because the mean of its divisors is an integer number (21877128).

Almost surely, 2^678345250 is an apocalyptic number.

678345250 is an abundant number, since it is smaller than the sum of its proper divisors (721790942).

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

678345250 is a wasteful number, since it uses less digits than its factorization.

678345250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668 (or 2658 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 678345250 is about 26045.0619120017. The cubic root of 678345250 is about 878.6520556520.

The spelling of 678345250 in words is "six hundred seventy-eight million, three hundred forty-five thousand, two hundred fifty".