28075081 has 4 divisors (see below), whose sum is σ = 28277200. Its totient is φ = 27872964.

The previous prime is 28075051. The next prime is 28075093. The reversal of 28075081 is 18057082.

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.

It is a cyclic number.

It is not a de Polignac number, because 28075081 - 2⁷ = 28074953 is a prime.

It is a super-2 number, since 2×28075081² = 1576420346313122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28075051) 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, 100851 + ... + 101128.

It is an arithmetic number, because the mean of its divisors is an integer number (7069300).

Almost surely, 2^28075081 is an apocalyptic number.

It is an amenable number.

28075081 is a deficient number, since it is larger than the sum of its proper divisors (202119).

28075081 is a wasteful number, since it uses less digits than its factorization.

28075081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202118.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 28075081 is about 5298.5923602406. The cubic root of 28075081 is about 303.9300717794.

The spelling of 28075081 in words is "twenty-eight million, seventy-five thousand, eighty-one".