28354228 has 24 divisors (see below), whose sum is σ = 58665600. Its totient is φ = 11732448.

The previous prime is 28354223. The next prime is 28354231. The reversal of 28354228 is 82245382.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28354193 and 28354202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28354223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16648 + ... + 18271.

It is an arithmetic number, because the mean of its divisors is an integer number (2444400).

Almost surely, 2^28354228 is an apocalyptic number.

28354228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28354228 is an abundant number, since it is smaller than the sum of its proper divisors (30311372).

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

28354228 is a wasteful number, since it uses less digits than its factorization.

28354228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34959 (or 34957 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 28354228 is about 5324.8688246754. The cubic root of 28354228 is about 304.9340643996.

It can be divided in two parts, 28354 and 228, that added together give a palindrome (28582).

The spelling of 28354228 in words is "twenty-eight million, three hundred fifty-four thousand, two hundred twenty-eight".