9872180 has 24 divisors (see below), whose sum is σ = 21447720. Its totient is φ = 3812480.

The previous prime is 9872171. The next prime is 9872201. The reversal of 9872180 is 812789.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3541924 + 6330256 = 1882^2 + 2516^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9872180.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7931 + ... + 9090.

It is an arithmetic number, because the mean of its divisors is an integer number (893655).

Almost surely, 2^9872180 is an apocalyptic number.

It is an amenable number.

9872180 is an abundant number, since it is smaller than the sum of its proper divisors (11575540).

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

9872180 is a wasteful number, since it uses less digits than its factorization.

9872180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17059 (or 17057 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 9872180 is about 3142.0025461479. The cubic root of 9872180 is about 214.5215971792.

The spelling of 9872180 in words is "nine million, eight hundred seventy-two thousand, one hundred eighty".