985413618 has 90 divisors (see below), whose sum is σ = 2507362767. Its totient is φ = 279682200.

The previous prime is 985413617. The next prime is 985413623. The reversal of 985413618 is 816314589.

985413618 is a `hidden beast` number, since 98 + 541 + 3 + 6 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 492706809 + 492706809 = 22197^2 + 22197^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=22197.

It is not an unprimeable number, because it can be changed into a prime (985413613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 6525843 + ... + 6525993.

Almost surely, 2^985413618 is an apocalyptic number.

985413618 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 985413618

985413618 is an abundant number, since it is smaller than the sum of its proper divisors (1521949149).

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

985413618 is an equidigital number, since it uses as much as digits as its factorization.

985413618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 163 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 985413618 is about 31391.2984439956. The cubic root of 985413618 is about 995.1140389313.

The spelling of 985413618 in words is "nine hundred eighty-five million, four hundred thirteen thousand, six hundred eighteen".