678250857 has 8 divisors (see below), whose sum is σ = 905721984. Its totient is φ = 451473488.

The previous prime is 678250813. The next prime is 678250871. The reversal of 678250857 is 758052876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 678250857 - 2²⁴ = 661473641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678250877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171153 + ... + 175070.

It is an arithmetic number, because the mean of its divisors is an integer number (113215248).

Almost surely, 2^678250857 is an apocalyptic number.

It is an amenable number.

678250857 is a deficient number, since it is larger than the sum of its proper divisors (227471127).

678250857 is a wasteful number, since it uses less digits than its factorization.

678250857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346879.

The product of its (nonzero) digits is 940800, while the sum is 48.

The square root of 678250857 is about 26043.2497396158. The cubic root of 678250857 is about 878.6112984069.

The spelling of 678250857 in words is "six hundred seventy-eight million, two hundred fifty thousand, eight hundred fifty-seven".