2228749 has 4 divisors (see below), whose sum is σ = 2231836. Its totient is φ = 2225664.

The previous prime is 2228747. The next prime is 2228753. The reversal of 2228749 is 9478222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1643524 + 585225 = 1282^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 2228749 - 2¹ = 2228747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2228741) 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, 187 + ... + 2119.

It is an arithmetic number, because the mean of its divisors is an integer number (557959).

2^2228749 is an apocalyptic number.

It is an amenable number.

2228749 is a deficient number, since it is larger than the sum of its proper divisors (3087).

2228749 is a wasteful number, since it uses less digits than its factorization.

2228749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086.

The product of its digits is 16128, while the sum is 34.

The square root of 2228749 is about 1492.8995277647. The cubic root of 2228749 is about 130.6232205217.

The spelling of 2228749 in words is "two million, two hundred twenty-eight thousand, seven hundred forty-nine".