428228 has 6 divisors (see below), whose sum is σ = 749406. Its totient is φ = 214112.

The previous prime is 428227. The next prime is 428231. The reversal of 428228 is 822824.

428228 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 369664 + 58564 = 608^2 + 242^2 .

It is a junction number, because it is equal to n+sod(n) for n = 428197 and 428206.

It is not an unprimeable number, because it can be changed into a prime (428221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53525 + ... + 53532.

It is an arithmetic number, because the mean of its divisors is an integer number (124901).

2⁴²⁸²²⁸ is an apocalyptic number.

It is an amenable number.

428228 is a deficient number, since it is larger than the sum of its proper divisors (321178).

428228 is a wasteful number, since it uses less digits than its factorization.

428228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107061 (or 107059 counting only the distinct ones).

The product of its digits is 2048, while the sum is 26.

The square root of 428228 is about 654.3913202358. The cubic root of 428228 is about 75.3745999574.

It can be divided in two parts, 428 and 228, that added together give a palindrome (656).

The spelling of 428228 in words is "four hundred twenty-eight thousand, two hundred twenty-eight".