28765127 has 4 divisors (see below), whose sum is σ = 28867776. Its totient is φ = 28662480.

The previous prime is 28765097. The next prime is 28765141. The reversal of 28765127 is 72156782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72156782 = 2 ⋅36078391.

It is a cyclic number.

It is not a de Polignac number, because 28765127 - 2⁸ = 28764871 is a prime.

It is a super-2 number, since 2×28765127² = 1654865062652258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28765147) 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, 50903 + ... + 51464.

It is an arithmetic number, because the mean of its divisors is an integer number (7216944).

Almost surely, 2^28765127 is an apocalyptic number.

28765127 is a deficient number, since it is larger than the sum of its proper divisors (102649).

28765127 is a wasteful number, since it uses less digits than its factorization.

28765127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102648.

The product of its digits is 47040, while the sum is 38.

The square root of 28765127 is about 5363.3130619049. The cubic root of 28765127 is about 306.4000030393.

The spelling of 28765127 in words is "twenty-eight million, seven hundred sixty-five thousand, one hundred twenty-seven".