9820457680 has 40 divisors (see below), whose sum is σ = 24908253984. Its totient is φ = 3571075200.

The previous prime is 9820457663. The next prime is 9820457693. The reversal of 9820457680 is 867540289.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5578926 + ... + 5580685.

Almost surely, 2^9820457680 is an apocalyptic number.

It is an amenable number.

9820457680 is an abundant number, since it is smaller than the sum of its proper divisors (15087796304).

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

9820457680 is a wasteful number, since it uses less digits than its factorization.

9820457680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11159635 (or 11159629 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 9820457680 is about 99098.2223856715. Note that the first 3 decimals coincide. The cubic root of 9820457680 is about 2141.4630051826.

The spelling of 9820457680 in words is "nine billion, eight hundred twenty million, four hundred fifty-seven thousand, six hundred eighty".