2172830 has 16 divisors (see below), whose sum is σ = 4266864. Its totient is φ = 790080.

The previous prime is 2172829. The next prime is 2172839. The reversal of 2172830 is 382712.

2172830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2172796 and 2172805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172839) 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 7 ways as a sum of consecutive naturals, for example, 9767 + ... + 9986.

It is an arithmetic number, because the mean of its divisors is an integer number (266679).

2^2172830 is an apocalyptic number.

2172830 is a deficient number, since it is larger than the sum of its proper divisors (2094034).

2172830 is a wasteful number, since it uses less digits than its factorization.

2172830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19771.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2172830 is about 1474.0522378803. The cubic root of 2172830 is about 129.5215151862.

The spelling of 2172830 in words is "two million, one hundred seventy-two thousand, eight hundred thirty".