985643506 has 16 divisors (see below), whose sum is σ = 1592474400. Its totient is φ = 456025248.

The previous prime is 985643497. The next prime is 985643521. The reversal of 985643506 is 605346589.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299971 + ... + 303238.

It is an arithmetic number, because the mean of its divisors is an integer number (99529650).

Almost surely, 2^985643506 is an apocalyptic number.

985643506 is a deficient number, since it is larger than the sum of its proper divisors (606830894).

985643506 is a wasteful number, since it uses less digits than its factorization.

985643506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603273.

The product of its (nonzero) digits is 777600, while the sum is 46.

The square root of 985643506 is about 31394.9598821212. The cubic root of 985643506 is about 995.1914165877.

The spelling of 985643506 in words is "nine hundred eighty-five million, six hundred forty-three thousand, five hundred six".