28705127 has 12 divisors (see below), whose sum is σ = 32742024. Its totient is φ = 24955920.

The previous prime is 28705111. The next prime is 28705141. The reversal of 28705127 is 72150782.

It is not a de Polignac number, because 28705127 - 2⁴ = 28705111 is a prime.

It is a super-2 number, since 2×28705127² = 1647968632172258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28705093 and 28705102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28705147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3353 + ... + 8285.

It is an arithmetic number, because the mean of its divisors is an integer number (2728502).

Almost surely, 2^28705127 is an apocalyptic number.

28705127 is a deficient number, since it is larger than the sum of its proper divisors (4036897).

28705127 is a wasteful number, since it uses less digits than its factorization.

28705127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990 (or 4967 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 28705127 is about 5357.7165845162. The cubic root of 28705127 is about 306.1868190085.

It can be divided in two parts, 2870 and 5127, that added together give a palindrome (7997).

The spelling of 28705127 in words is "twenty-eight million, seven hundred five thousand, one hundred twenty-seven".