2206728 has 24 divisors (see below), whose sum is σ = 5976750. Its totient is φ = 735552.

The previous prime is 2206723. The next prime is 2206733. The reversal of 2206728 is 8276022.

It is an interprime number because it is at equal distance from previous prime (2206723) and next prime (2206733).

It can be written as a sum of positive squares in only one way, i.e., 2196324 + 10404 = 1482^2 + 102^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2206723) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 15253 + ... + 15396.

2^2206728 is an apocalyptic number.

It is an amenable number.

2206728 is an abundant number, since it is smaller than the sum of its proper divisors (3770022).

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

2206728 is a wasteful number, since it uses less digits than its factorization.

2206728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30661 (or 30654 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 2206728 is about 1485.5059744074. The cubic root of 2206728 is about 130.1915912654.

The spelling of 2206728 in words is "two million, two hundred six thousand, seven hundred twenty-eight".