28701601 has 2 divisors, whose sum is σ = 28701602. Its totient is φ = 28701600.

The previous prime is 28701551. The next prime is 28701611. The reversal of 28701601 is 10610782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17472400 + 11229201 = 4180^2 + 3351^2 .

It is a cyclic number.

It is not a de Polignac number, because 28701601 - 2¹³ = 28693409 is a prime.

It is not a weakly prime, because it can be changed into another prime (28701611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14350800 + 14350801.

It is an arithmetic number, because the mean of its divisors is an integer number (14350801).

Almost surely, 2^28701601 is an apocalyptic number.

It is an amenable number.

28701601 is a deficient number, since it is larger than the sum of its proper divisors (1).

28701601 is an equidigital number, since it uses as much as digits as its factorization.

28701601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 28701601 is about 5357.3875163180. The cubic root of 28701601 is about 306.1742816555.

The spelling of 28701601 in words is "twenty-eight million, seven hundred one thousand, six hundred one".