1628228 has 12 divisors (see below), whose sum is σ = 3256512. Its totient is φ = 697800.

The previous prime is 1628227. The next prime is 1628261. The reversal of 1628228 is 8228261.

1628228 is an admirable number.

It is a super-2 number, since 2×1628228² = 5302252839968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1628228.

It is not an unprimeable number, because it can be changed into a prime (1628227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29048 + ... + 29103.

It is an arithmetic number, because the mean of its divisors is an integer number (271376).

2^1628228 is an apocalyptic number.

It is an amenable number.

1628228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1628228 is a wasteful number, since it uses less digits than its factorization.

1628228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58162 (or 58160 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 1628228 is about 1276.0203760129. The cubic root of 1628228 is about 117.6445301613.

The spelling of 1628228 in words is "one million, six hundred twenty-eight thousand, two hundred twenty-eight".