28701817 has 2 divisors, whose sum is σ = 28701818. Its totient is φ = 28701816.

The previous prime is 28701811. The next prime is 28701839. The reversal of 28701817 is 71810782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20286016 + 8415801 = 4504^2 + 2901^2 .

It is a cyclic number.

It is not a de Polignac number, because 28701817 - 2³ = 28701809 is a prime.

It is not a weakly prime, because it can be changed into another prime (28701811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14350908 + 14350909.

It is an arithmetic number, because the mean of its divisors is an integer number (14350909).

Almost surely, 2^28701817 is an apocalyptic number.

It is an amenable number.

28701817 is a deficient number, since it is larger than the sum of its proper divisors (1).

28701817 is an equidigital number, since it uses as much as digits as its factorization.

28701817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 28701817 is about 5357.4076753594. The cubic root of 28701817 is about 306.1750497135.

The spelling of 28701817 in words is "twenty-eight million, seven hundred one thousand, eight hundred seventeen".