28222601 has 16 divisors (see below), whose sum is σ = 33488640. Its totient is φ = 23489280.

The previous prime is 28222561. The next prime is 28222609. The reversal of 28222601 is 10622282.

It is a cyclic number.

It is not a de Polignac number, because 28222601 - 2²² = 24028297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28222609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4880 + ... + 8958.

It is an arithmetic number, because the mean of its divisors is an integer number (2093040).

Almost surely, 2^28222601 is an apocalyptic number.

It is an amenable number.

28222601 is a deficient number, since it is larger than the sum of its proper divisors (5266039).

28222601 is a wasteful number, since it uses less digits than its factorization.

28222601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 28222601 is about 5312.4947999975. The cubic root of 28222601 is about 304.4614737851.

Adding to 28222601 its reverse (10622282), we get a palindrome (38844883).

The spelling of 28222601 in words is "twenty-eight million, two hundred twenty-two thousand, six hundred one".