2106728 has 32 divisors (see below), whose sum is σ = 4354560. Its totient is φ = 949440.

The previous prime is 2106679. The next prime is 2106733. The reversal of 2106728 is 8276012.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 2106697 and 2106706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4673 + ... + 5103.

It is an arithmetic number, because the mean of its divisors is an integer number (136080).

2^2106728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2106728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2177280).

2106728 is an abundant number, since it is smaller than the sum of its proper divisors (2247832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2106728 is a wasteful number, since it uses less digits than its factorization.

2106728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 2106728 is about 1451.4571988178. The cubic root of 2106728 is about 128.1945284337.

The spelling of 2106728 in words is "two million, one hundred six thousand, seven hundred twenty-eight".