2105728 has 16 divisors (see below), whose sum is σ = 4195260. Its totient is φ = 1052800.

The previous prime is 2105717. The next prime is 2105729. The reversal of 2105728 is 8275012.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8098 + ... + 8353.

2^2105728 is an apocalyptic number.

It is an amenable number.

2105728 is a deficient number, since it is larger than the sum of its proper divisors (2089532).

2105728 is an equidigital number, since it uses as much as digits as its factorization.

2105728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16465 (or 16453 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2105728 is about 1451.1126765348. The cubic root of 2105728 is about 128.1742418698.

The spelling of 2105728 in words is "two million, one hundred five thousand, seven hundred twenty-eight".