28059011 has 4 divisors (see below), whose sum is σ = 29278992. Its totient is φ = 26839032.

The previous prime is 28059007. The next prime is 28059019. The reversal of 28059011 is 11095082.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28059011 - 2² = 28059007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28059019) 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, 609956 + ... + 610001.

It is an arithmetic number, because the mean of its divisors is an integer number (7319748).

Almost surely, 2^28059011 is an apocalyptic number.

28059011 is a deficient number, since it is larger than the sum of its proper divisors (1219981).

28059011 is a wasteful number, since it uses less digits than its factorization.

28059011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219980.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 28059011 is about 5297.0757026873. The cubic root of 28059011 is about 303.8720714904.

The spelling of 28059011 in words is "twenty-eight million, fifty-nine thousand, eleven".