859978 has 32 divisors (see below), whose sum is σ = 1607040. Its totient is φ = 336960.

The previous prime is 859973. The next prime is 859981. The reversal of 859978 is 879958.

It is not an unprimeable number, because it can be changed into a prime (859973) by changing a digit.

859978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14068 + ... + 14128.

It is an arithmetic number, because the mean of its divisors is an integer number (50220).

2⁸⁵⁹⁹⁷⁸ is an apocalyptic number.

859978 is a deficient number, since it is larger than the sum of its proper divisors (747062).

859978 is a wasteful number, since it uses less digits than its factorization.

859978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142.

The product of its digits is 181440, while the sum is 46.

The square root of 859978 is about 927.3499878687. The cubic root of 859978 is about 95.0960432203.

The spelling of 859978 in words is "eight hundred fifty-nine thousand, nine hundred seventy-eight".