985866 has 16 divisors (see below), whose sum is σ = 2253504. Its totient is φ = 281664.

The previous prime is 985819. The next prime is 985867. The reversal of 985866 is 668589.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 23473 = 985866 / (9 + 8 + 5 + 8 + 6 + 6).

It is not an unprimeable number, because it can be changed into a prime (985867) 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, 11695 + ... + 11778.

It is an arithmetic number, because the mean of its divisors is an integer number (140844).

2⁹⁸⁵⁸⁶⁶ is an apocalyptic number.

985866 is an abundant number, since it is smaller than the sum of its proper divisors (1267638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

985866 is a wasteful number, since it uses less digits than its factorization.

985866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23485.

The product of its digits is 103680, while the sum is 42.

The square root of 985866 is about 992.9078507092. The cubic root of 985866 is about 99.5266294052.

The spelling of 985866 in words is "nine hundred eighty-five thousand, eight hundred sixty-six".