2271728 has 20 divisors (see below), whose sum is σ = 4510128. Its totient is φ = 1107840.

The previous prime is 2271721. The next prime is 2271743. The reversal of 2271728 is 8271722.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2271728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271721) 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, 1076 + ... + 2387.

2^2271728 is an apocalyptic number.

It is an amenable number.

2271728 is a deficient number, since it is larger than the sum of its proper divisors (2238400).

2271728 is a wasteful number, since it uses less digits than its factorization.

2271728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512 (or 3506 counting only the distinct ones).

The product of its digits is 3136, while the sum is 29.

The square root of 2271728 is about 1507.2252651810. The cubic root of 2271728 is about 131.4575226526.

The spelling of 2271728 in words is "two million, two hundred seventy-one thousand, seven hundred twenty-eight".