28045127 has 4 divisors (see below), whose sum is σ = 30594696. Its totient is φ = 25495560.

The previous prime is 28045093. The next prime is 28045141. The reversal of 28045127 is 72154082.

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 28045127 - 2¹⁰ = 28044103 is a prime.

It is a super-2 number, since 2×28045127² = 1573058296892258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28045127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28045187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1274768 + ... + 1274789.

It is an arithmetic number, because the mean of its divisors is an integer number (7648674).

Almost surely, 2^28045127 is an apocalyptic number.

28045127 is a deficient number, since it is larger than the sum of its proper divisors (2549569).

28045127 is a wasteful number, since it uses less digits than its factorization.

28045127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549568.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 28045127 is about 5295.7650061157. The cubic root of 28045127 is about 303.8219431389.

The spelling of 28045127 in words is "twenty-eight million, forty-five thousand, one hundred twenty-seven".