28223826 has 32 divisors (see below), whose sum is σ = 59705856. Its totient is φ = 8880000.

The previous prime is 28223821. The next prime is 28223827. The reversal of 28223826 is 62832282.

It is not an unprimeable number, because it can be changed into a prime (28223821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5776 + ... + 9476.

It is an arithmetic number, because the mean of its divisors is an integer number (1865808).

Almost surely, 2^28223826 is an apocalyptic number.

28223826 is an abundant number, since it is smaller than the sum of its proper divisors (31482030).

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

28223826 is a wasteful number, since it uses less digits than its factorization.

28223826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3778.

The product of its digits is 18432, while the sum is 33.

The square root of 28223826 is about 5312.6100929769. The cubic root of 28223826 is about 304.4658787643.

The spelling of 28223826 in words is "twenty-eight million, two hundred twenty-three thousand, eight hundred twenty-six".