28226928 has 20 divisors (see below), whose sum is σ = 72919688. Its totient is φ = 9408960.

The previous prime is 28226927. The next prime is 28226929. The reversal of 28226928 is 82962282.

It is an interprime number because it is at equal distance from previous prime (28226927) and next prime (28226929).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28226923) 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, 293983 + ... + 294078.

Almost surely, 2^28226928 is an apocalyptic number.

It is an amenable number.

28226928 is an abundant number, since it is smaller than the sum of its proper divisors (44692760).

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

28226928 is a wasteful number, since it uses less digits than its factorization.

28226928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588072 (or 588066 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 28226928 is about 5312.9020318466. The cubic root of 28226928 is about 304.4770326804.

The spelling of 28226928 in words is "twenty-eight million, two hundred twenty-six thousand, nine hundred twenty-eight".