28745201 has 2 divisors, whose sum is σ = 28745202. Its totient is φ = 28745200.

The previous prime is 28745191. The next prime is 28745207. The reversal of 28745201 is 10254782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 602176 = 5305^2 + 776^2 .

It is a cyclic number.

It is not a de Polignac number, because 28745201 - 2¹⁸ = 28483057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28745207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14372600 + 14372601.

It is an arithmetic number, because the mean of its divisors is an integer number (14372601).

Almost surely, 2^28745201 is an apocalyptic number.

It is an amenable number.

28745201 is a deficient number, since it is larger than the sum of its proper divisors (1).

28745201 is an equidigital number, since it uses as much as digits as its factorization.

28745201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 28745201 is about 5361.4551196480. The cubic root of 28745201 is about 306.3292375281.

Adding to 28745201 its reverse (10254782), we get a palindrome (38999983).

The spelling of 28745201 in words is "twenty-eight million, seven hundred forty-five thousand, two hundred one".