28364875 has 48 divisors (see below), whose sum is σ = 45029088. Its totient is φ = 17640000.

The previous prime is 28364873. The next prime is 28364879. The reversal of 28364875 is 57846382.

It is not a de Polignac number, because 28364875 - 2¹ = 28364873 is a prime.

It is a super-2 number, since 2×28364875² = 1609132267531250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28364873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67165 + ... + 67585.

It is an arithmetic number, because the mean of its divisors is an integer number (938106).

Almost surely, 2^28364875 is an apocalyptic number.

28364875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28364875 is a deficient number, since it is larger than the sum of its proper divisors (16664213).

28364875 is a wasteful number, since it uses less digits than its factorization.

28364875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 444 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 28364875 is about 5325.8684737797. The cubic root of 28364875 is about 304.9722271585.

The spelling of 28364875 in words is "twenty-eight million, three hundred sixty-four thousand, eight hundred seventy-five".