2228739 has 4 divisors (see below), whose sum is σ = 2971656. Its totient is φ = 1485824.

The previous prime is 2228731. The next prime is 2228741. The reversal of 2228739 is 9378222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2228739 - 2³ = 2228731 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 2¹⁷ + 2²¹ + 8 + 7³ + 3³ + 9 .

It is a D-number.

2228739 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2228731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371454 + ... + 371459.

It is an arithmetic number, because the mean of its divisors is an integer number (742914).

2^2228739 is an apocalyptic number.

2228739 is a deficient number, since it is larger than the sum of its proper divisors (742917).

2228739 is an equidigital number, since it uses as much as digits as its factorization.

2228739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742916.

The product of its digits is 12096, while the sum is 33.

The square root of 2228739 is about 1492.8961785737. The cubic root of 2228739 is about 130.6230251603.

The spelling of 2228739 in words is "two million, two hundred twenty-eight thousand, seven hundred thirty-nine".