678961250 has 90 divisors (see below), whose sum is σ = 1420047783. Its totient is φ = 243210000.

The previous prime is 678961243. The next prime is 678961273. The reversal of 678961250 is 52169876.

It can be written as a sum of positive squares in 3 ways, for example, as 156975841 + 521985409 = 12529^2 + 22847^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18425.

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 44 ways as a sum of consecutive naturals, for example, 10133717 + ... + 10133783.

Almost surely, 2^678961250 is an apocalyptic number.

678961250 is an abundant number, since it is smaller than the sum of its proper divisors (741086533).

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

678961250 is an equidigital number, since it uses as much as digits as its factorization.

678961250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 678961250 is about 26056.8848867243. The cubic root of 678961250 is about 878.9179408651.

The spelling of 678961250 in words is "six hundred seventy-eight million, nine hundred sixty-one thousand, two hundred fifty".