2159728 has 20 divisors (see below), whose sum is σ = 4207320. Its totient is φ = 1073984.

The previous prime is 2159719. The next prime is 2159767. The reversal of 2159728 is 8279512.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 2159693 and 2159702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5358 + ... + 5746.

It is an arithmetic number, because the mean of its divisors is an integer number (210366).

2^2159728 is an apocalyptic number.

It is an amenable number.

2159728 is a deficient number, since it is larger than the sum of its proper divisors (2047592).

2159728 is a wasteful number, since it uses less digits than its factorization.

2159728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 738 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 2159728 is about 1469.6013064774. The cubic root of 2159728 is about 129.2606551905.

The spelling of 2159728 in words is "two million, one hundred fifty-nine thousand, seven hundred twenty-eight".