2108728 has 8 divisors (see below), whose sum is σ = 3953880. Its totient is φ = 1054360.

The previous prime is 2108723. The next prime is 2108737. The reversal of 2108728 is 8278012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2108696 and 2108705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131788 + ... + 131803.

It is an arithmetic number, because the mean of its divisors is an integer number (494235).

2^2108728 is an apocalyptic number.

It is an amenable number.

2108728 is a deficient number, since it is larger than the sum of its proper divisors (1845152).

2108728 is a wasteful number, since it uses less digits than its factorization.

2108728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263597 (or 263593 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2108728 is about 1452.1459981696. The cubic root of 2108728 is about 128.2350823110.

It can be divided in two parts, 21087 and 28, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 2108728 in words is "two million, one hundred eight thousand, seven hundred twenty-eight".