678578 has 4 divisors (see below), whose sum is σ = 1017870. Its totient is φ = 339288.

The previous prime is 678577. The next prime is 678581. The reversal of 678578 is 875876.

678578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 628849 + 49729 = 793^2 + 223^2 .

It is not an unprimeable number, because it can be changed into a prime (678577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169643 + ... + 169646.

2⁶⁷⁸⁵⁷⁸ is an apocalyptic number.

678578 is a deficient number, since it is larger than the sum of its proper divisors (339292).

678578 is a wasteful number, since it uses less digits than its factorization.

678578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339291.

The product of its digits is 94080, while the sum is 41.

The square root of 678578 is about 823.7584597441. The cubic root of 678578 is about 87.8752536875.

The spelling of 678578 in words is "six hundred seventy-eight thousand, five hundred seventy-eight".