28557027 has 12 divisors (see below), whose sum is σ = 41296944. Its totient is φ = 19015920.

The previous prime is 28557017. The next prime is 28557029. The reversal of 28557027 is 72075582.

28557027 is a `hidden beast` number, since 2 + 85 + 570 + 2 + 7 = 666.

It is not a de Polignac number, because 28557027 - 2¹¹ = 28554979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28556982 and 28557000.

It is not an unprimeable number, because it can be changed into a prime (28557029) 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 11 ways as a sum of consecutive naturals, for example, 11202 + ... + 13512.

It is an arithmetic number, because the mean of its divisors is an integer number (3441412).

Almost surely, 2^28557027 is an apocalyptic number.

28557027 is a deficient number, since it is larger than the sum of its proper divisors (12739917).

28557027 is a wasteful number, since it uses less digits than its factorization.

28557027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3690 (or 3687 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 28557027 is about 5343.8775247941. The cubic root of 28557027 is about 305.6593350964.

The spelling of 28557027 in words is "twenty-eight million, five hundred fifty-seven thousand, twenty-seven".