28147575 has 24 divisors (see below), whose sum is σ = 46747008. Its totient is φ = 14944480.

The previous prime is 28147573. The next prime is 28147583. The reversal of 28147575 is 57574182.

It is not a de Polignac number, because 28147575 - 2¹ = 28147573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28147573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19012 + ... + 20438.

It is an arithmetic number, because the mean of its divisors is an integer number (1947792).

Almost surely, 2^28147575 is an apocalyptic number.

28147575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28147575 is a deficient number, since it is larger than the sum of its proper divisors (18599433).

28147575 is a wasteful number, since it uses less digits than its factorization.

28147575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703 (or 1698 counting only the distinct ones).

The product of its digits is 78400, while the sum is 39.

The square root of 28147575 is about 5305.4288233846. The cubic root of 28147575 is about 304.1914443651.

The spelling of 28147575 in words is "twenty-eight million, one hundred forty-seven thousand, five hundred seventy-five".