678049250 has 32 divisors (see below), whose sum is σ = 1343981808. Its totient is φ = 255264000.

The previous prime is 678049249. The next prime is 678049279. The reversal of 678049250 is 52940876.

It can be written as a sum of positive squares in 8 ways, for example, as 37908649 + 640140601 = 6157^2 + 25301^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 678049198 and 678049207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75521 + ... + 84020.

Almost surely, 2^678049250 is an apocalyptic number.

678049250 is a deficient number, since it is larger than the sum of its proper divisors (665932558).

678049250 is a wasteful number, since it uses less digits than its factorization.

678049250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159575 (or 159565 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 678049250 is about 26039.3788328370. The cubic root of 678049250 is about 878.5242353683.

The spelling of 678049250 in words is "six hundred seventy-eight million, forty-nine thousand, two hundred fifty".