28601611 has 4 divisors (see below), whose sum is σ = 28707424. Its totient is φ = 28495800.

The previous prime is 28601603. The next prime is 28601647. The reversal of 28601611 is 11610682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11610682 = 2 ⋅5805341.

It is a cyclic number.

It is not a de Polignac number, because 28601611 - 2³ = 28601603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28671611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52500 + ... + 53041.

It is an arithmetic number, because the mean of its divisors is an integer number (7176856).

Almost surely, 2^28601611 is an apocalyptic number.

28601611 is a deficient number, since it is larger than the sum of its proper divisors (105813).

28601611 is a wasteful number, since it uses less digits than its factorization.

28601611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105812.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 28601611 is about 5348.0474006875. The cubic root of 28601611 is about 305.8183202511.

The spelling of 28601611 in words is "twenty-eight million, six hundred one thousand, six hundred eleven".