1028216 has 48 divisors (see below), whose sum is σ = 2332440. Its totient is φ = 423360.

The previous prime is 1028213. The next prime is 1028221. The reversal of 1028216 is 6128201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028213) 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 11 ways as a sum of consecutive naturals, for example, 16826 + ... + 16886.

2^1028216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1028216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1166220).

1028216 is an abundant number, since it is smaller than the sum of its proper divisors (1304224).

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

1028216 is a wasteful number, since it uses less digits than its factorization.

1028216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1028216 is about 1014.0098618850. The cubic root of 1028216 is about 100.9318234147.

Subtracting from 1028216 its sum of digits (20), we obtain a square (1028196 = 1014²).

The spelling of 1028216 in words is "one million, twenty-eight thousand, two hundred sixteen".