9784980 has 36 divisors (see below), whose sum is σ = 29681652. Its totient is φ = 2609280.

The previous prime is 9784921. The next prime is 9784987. The reversal of 9784980 is 894879.

It can be written as a sum of positive squares in 2 ways, for example, as 4613904 + 5171076 = 2148^2 + 2274^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9784987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27001 + ... + 27360.

Almost surely, 2^9784980 is an apocalyptic number.

9784980 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9784980 is an abundant number, since it is smaller than the sum of its proper divisors (19896672).

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

9784980 is a wasteful number, since it uses less digits than its factorization.

9784980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54376 (or 54371 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 9784980 is about 3128.0952670915. The cubic root of 9784980 is about 213.8881122390. Note that the first 3 decimals are identical.

The spelling of 9784980 in words is "nine million, seven hundred eighty-four thousand, nine hundred eighty".