28821022 has 8 divisors (see below), whose sum is σ = 43262856. Its totient is φ = 14400072.

The previous prime is 28820993. The next prime is 28821049. The reversal of 28821022 is 22012882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128 + ... + 7675.

It is an arithmetic number, because the mean of its divisors is an integer number (5407857).

Almost surely, 2^28821022 is an apocalyptic number.

28821022 is a deficient number, since it is larger than the sum of its proper divisors (14441834).

28821022 is a wasteful number, since it uses less digits than its factorization.

28821022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10442.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 28821022 is about 5368.5213979270. The cubic root of 28821022 is about 306.5983351746.

The spelling of 28821022 in words is "twenty-eight million, eight hundred twenty-one thousand, twenty-two".