2178980 has 12 divisors (see below), whose sum is σ = 4575900. Its totient is φ = 871584.

The previous prime is 2178947. The next prime is 2178983. The reversal of 2178980 is 898712.

It is a happy number.

2178980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1705636 + 473344 = 1306^2 + 688^2 .

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 2178980.

It is not an unprimeable number, because it can be changed into a prime (2178983) 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 3 ways as a sum of consecutive naturals, for example, 54455 + ... + 54494.

It is an arithmetic number, because the mean of its divisors is an integer number (381325).

2^2178980 is an apocalyptic number.

2178980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2178980 is an abundant number, since it is smaller than the sum of its proper divisors (2396920).

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

2178980 is a wasteful number, since it uses less digits than its factorization.

2178980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108958 (or 108956 counting only the distinct ones).

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

The square root of 2178980 is about 1476.1368500244. The cubic root of 2178980 is about 129.6435997441.

The spelling of 2178980 in words is "two million, one hundred seventy-eight thousand, nine hundred eighty".