28422005 has 8 divisors (see below), whose sum is σ = 35901600. Its totient is φ = 21540816.

The previous prime is 28421999. The next prime is 28422013. The reversal of 28422005 is 50022482.

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

It is a cyclic number.

It is not a de Polignac number, because 28422005 - 2⁸ = 28421749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149495 + ... + 149684.

It is an arithmetic number, because the mean of its divisors is an integer number (4487700).

Almost surely, 2^28422005 is an apocalyptic number.

It is an amenable number.

28422005 is a deficient number, since it is larger than the sum of its proper divisors (7479595).

28422005 is a wasteful number, since it uses less digits than its factorization.

28422005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299203.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 28422005 is about 5331.2292203581. The cubic root of 28422005 is about 305.1768391311.

Adding to 28422005 its reverse (50022482), we get a palindrome (78444487).

The spelling of 28422005 in words is "twenty-eight million, four hundred twenty-two thousand, five".