2217428 has 12 divisors (see below), whose sum is σ = 3927840. Its totient is φ = 1095192.

The previous prime is 2217421. The next prime is 2217443. The reversal of 2217428 is 8247122.

2217428 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 d-powerful number, because it can be written as 2 + 2¹¹ + 1 + 7⁶ + 4³ + 2²¹ + 8³ .

It is a junction number, because it is equal to n+sod(n) for n = 2217397 and 2217406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217421) by changing a digit.

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, 3008 + ... + 3671.

It is an arithmetic number, because the mean of its divisors is an integer number (327320).

2^2217428 is an apocalyptic number.

It is an amenable number.

2217428 is a deficient number, since it is larger than the sum of its proper divisors (1710412).

2217428 is a wasteful number, since it uses less digits than its factorization.

2217428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6766 (or 6764 counting only the distinct ones).

The product of its digits is 1792, while the sum is 26.

The square root of 2217428 is about 1489.1030857533. The cubic root of 2217428 is about 130.4016767446.

The spelling of 2217428 in words is "two million, two hundred seventeen thousand, four hundred twenty-eight".