28017701 has 4 divisors (see below), whose sum is σ = 28028832. Its totient is φ = 28006572.

The previous prime is 28017697. The next prime is 28017721. The reversal of 28017701 is 10771082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28017701 - 2² = 28017697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28017721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206 + ... + 7488.

It is an arithmetic number, because the mean of its divisors is an integer number (7007208).

Almost surely, 2^28017701 is an apocalyptic number.

It is an amenable number.

28017701 is a deficient number, since it is larger than the sum of its proper divisors (11131).

28017701 is an equidigital number, since it uses as much as digits as its factorization.

28017701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11130.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 28017701 is about 5293.1749451534. The cubic root of 28017701 is about 303.7228725908.

Adding to 28017701 its reverse (10771082), we get a palindrome (38788783).

The spelling of 28017701 in words is "twenty-eight million, seventeen thousand, seven hundred one".