984643646 has 16 divisors (see below), whose sum is σ = 1719810144. Its totient is φ = 414027744.

The previous prime is 984643619. The next prime is 984643657. The reversal of 984643646 is 646346489.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 984643594 and 984643603.

It is a congruent number.

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, 662765 + ... + 664248.

It is an arithmetic number, because the mean of its divisors is an integer number (107488134).

Almost surely, 2^984643646 is an apocalyptic number.

984643646 is a deficient number, since it is larger than the sum of its proper divisors (735166498).

984643646 is a wasteful number, since it uses less digits than its factorization.

984643646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327075.

The product of its digits is 2985984, while the sum is 50.

The square root of 984643646 is about 31379.0319481019. The cubic root of 984643646 is about 994.8547875254.

The spelling of 984643646 in words is "nine hundred eighty-four million, six hundred forty-three thousand, six hundred forty-six".