28228301 has 4 divisors (see below), whose sum is σ = 28283004. Its totient is φ = 28173600.

The previous prime is 28228289. The next prime is 28228307. The reversal of 28228301 is 10382282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10382282 = 2 ⋅5191141.

It can be written as a sum of positive squares in 2 ways, for example, as 2725801 + 25502500 = 1651^2 + 5050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28228301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28228307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26570 + ... + 27611.

It is an arithmetic number, because the mean of its divisors is an integer number (7070751).

Almost surely, 2^28228301 is an apocalyptic number.

It is an amenable number.

28228301 is a deficient number, since it is larger than the sum of its proper divisors (54703).

28228301 is an equidigital number, since it uses as much as digits as its factorization.

28228301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54702.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 28228301 is about 5313.0312440263. The cubic root of 28228301 is about 304.4819693398.

The spelling of 28228301 in words is "twenty-eight million, two hundred twenty-eight thousand, three hundred one".