28228588 has 12 divisors (see below), whose sum is σ = 49471072. Its totient is φ = 14094000.

The previous prime is 28228573. The next prime is 28228621. The reversal of 28228588 is 88582282.

It is a happy number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1695 + ... + 7702.

Almost surely, 2^28228588 is an apocalyptic number.

It is an amenable number.

28228588 is a deficient number, since it is larger than the sum of its proper divisors (21242484).

28228588 is a wasteful number, since it uses less digits than its factorization.

28228588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10152 (or 10150 counting only the distinct ones).

The product of its digits is 163840, while the sum is 43.

The square root of 28228588 is about 5313.0582530215. The cubic root of 28228588 is about 304.4830012359.

The spelling of 28228588 in words is "twenty-eight million, two hundred twenty-eight thousand, five hundred eighty-eight".