28472201 has 2 divisors, whose sum is σ = 28472202. Its totient is φ = 28472200.

The previous prime is 28472159. The next prime is 28472219. The reversal of 28472201 is 10227482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26512201 + 1960000 = 5149^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 28472201 - 2¹⁸ = 28210057 is a prime.

It is not a weakly prime, because it can be changed into another prime (28472281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14236100 + 14236101.

It is an arithmetic number, because the mean of its divisors is an integer number (14236101).

Almost surely, 2^28472201 is an apocalyptic number.

It is an amenable number.

28472201 is a deficient number, since it is larger than the sum of its proper divisors (1).

28472201 is an equidigital number, since it uses as much as digits as its factorization.

28472201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 28472201 is about 5335.9348759144. The cubic root of 28472201 is about 305.3563907072.

Adding to 28472201 its reverse (10227482), we get a palindrome (38699683).

The spelling of 28472201 in words is "twenty-eight million, four hundred seventy-two thousand, two hundred one".