985778 has 8 divisors (see below), whose sum is σ = 1510272. Its totient is φ = 482356.

The previous prime is 985759. The next prime is 985781. The reversal of 985778 is 877589.

985778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

985778 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5150 + ... + 5337.

It is an arithmetic number, because the mean of its divisors is an integer number (188784).

2⁹⁸⁵⁷⁷⁸ is an apocalyptic number.

985778 is a deficient number, since it is larger than the sum of its proper divisors (524494).

985778 is a wasteful number, since it uses less digits than its factorization.

985778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10536.

The product of its digits is 141120, while the sum is 44.

The square root of 985778 is about 992.8635354368. The cubic root of 985778 is about 99.5236680143.

The spelling of 985778 in words is "nine hundred eighty-five thousand, seven hundred seventy-eight".