28657201 has 2 divisors, whose sum is σ = 28657202. Its totient is φ = 28657200.

The previous prime is 28657163. The next prime is 28657243. The reversal of 28657201 is 10275682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21902400 + 6754801 = 4680^2 + 2599^2 .

It is a cyclic number.

It is not a de Polignac number, because 28657201 - 2¹⁷ = 28526129 is a prime.

It is not a weakly prime, because it can be changed into another prime (28657261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14328600 + 14328601.

It is an arithmetic number, because the mean of its divisors is an integer number (14328601).

Almost surely, 2^28657201 is an apocalyptic number.

It is an amenable number.

28657201 is a deficient number, since it is larger than the sum of its proper divisors (1).

28657201 is an equidigital number, since it uses as much as digits as its factorization.

28657201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 28657201 is about 5353.2421017548. The cubic root of 28657201 is about 306.0163211993.

The spelling of 28657201 in words is "twenty-eight million, six hundred fifty-seven thousand, two hundred one".