28520127 has 16 divisors (see below), whose sum is σ = 42336000. Its totient is φ = 18975672.

The previous prime is 28520119. The next prime is 28520131. The reversal of 28520127 is 72102582.

It is not a de Polignac number, because 28520127 - 2³ = 28520119 is a prime.

It is a super-3 number, since 3×28520127³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 28520127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28520827) 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 15 ways as a sum of consecutive naturals, for example, 22024 + ... + 23282.

It is an arithmetic number, because the mean of its divisors is an integer number (2646000).

Almost surely, 2^28520127 is an apocalyptic number.

28520127 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28520127 is a deficient number, since it is larger than the sum of its proper divisors (13815873).

28520127 is a wasteful number, since it uses less digits than its factorization.

28520127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107 (or 2101 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28520127 is about 5340.4238595827. The cubic root of 28520127 is about 305.5276256467.

The spelling of 28520127 in words is "twenty-eight million, five hundred twenty thousand, one hundred twenty-seven".