2223728 has 20 divisors (see below), whose sum is σ = 4640328. Its totient is φ = 1026240.

The previous prime is 2223713. The next prime is 2223731. The reversal of 2223728 is 8273222.

2223728 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

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

It is a d-powerful number, because it can be written as 2 + 2² + 2¹² + 3⁶ + 7⁶ + 2²¹ + 8⁴ .

It is a junction number, because it is equal to n+sod(n) for n = 2223697 and 2223706.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5138 + ... + 5553.

2^2223728 is an apocalyptic number.

It is an amenable number.

2223728 is an abundant number, since it is smaller than the sum of its proper divisors (2416600).

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

2223728 is a wasteful number, since it uses less digits than its factorization.

2223728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10712 (or 10706 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 2223728 is about 1491.2169526933. The cubic root of 2223728 is about 130.5250559876.

The spelling of 2223728 in words is "two million, two hundred twenty-three thousand, seven hundred twenty-eight".