2130728 has 16 divisors (see below), whose sum is σ = 4032180. Its totient is φ = 1055488.

The previous prime is 2130727. The next prime is 2130757. The reversal of 2130728 is 8270312.

It can be written as a sum of positive squares in 2 ways, for example, as 1643524 + 487204 = 1282^2 + 698^2 .

It is not an unprimeable number, because it can be changed into a prime (2130721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275 + ... + 2082.

2^2130728 is an apocalyptic number.

It is an amenable number.

2130728 is a deficient number, since it is larger than the sum of its proper divisors (1901452).

2130728 is a wasteful number, since it uses less digits than its factorization.

2130728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476 (or 2472 counting only the distinct ones).

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

The square root of 2130728 is about 1459.7013393157. The cubic root of 2130728 is about 128.6794919816.

The spelling of 2130728 in words is "two million, one hundred thirty thousand, seven hundred twenty-eight".