2180928 has 56 divisors (see below), whose sum is σ = 5945632. Its totient is φ = 705024.

The previous prime is 2180923. The next prime is 2180957. The reversal of 2180928 is 8290812.

It is a junction number, because it is equal to n+sod(n) for n = 2180895 and 2180904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6951 + ... + 7257.

It is an arithmetic number, because the mean of its divisors is an integer number (106172).

2^2180928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2180928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2972816).

2180928 is an abundant number, since it is smaller than the sum of its proper divisors (3764704).

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

2180928 is a wasteful number, since it uses less digits than its factorization.

2180928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 2180928 is about 1476.7965330404. The cubic root of 2180928 is about 129.6822218687.

The spelling of 2180928 in words is "two million, one hundred eighty thousand, nine hundred twenty-eight".