28422201 has 8 divisors (see below), whose sum is σ = 37981024. Its totient is φ = 18905760.

The previous prime is 28422187. The next prime is 28422203. The reversal of 28422201 is 10222482.

It is a happy number.

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

It is not a de Polignac number, because 28422201 - 2⁷ = 28422073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28422203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8995 + ... + 11736.

It is an arithmetic number, because the mean of its divisors is an integer number (4747628).

Almost surely, 2^28422201 is an apocalyptic number.

It is an amenable number.

28422201 is a deficient number, since it is larger than the sum of its proper divisors (9558823).

28422201 is a wasteful number, since it uses less digits than its factorization.

28422201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21191.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 28422201 is about 5331.2476025786. The cubic root of 28422201 is about 305.1775406360.

Adding to 28422201 its reverse (10222482), we get a palindrome (38644683).

The spelling of 28422201 in words is "twenty-eight million, four hundred twenty-two thousand, two hundred one".