28786375 has 8 divisors (see below), whose sum is σ = 35925552. Its totient is φ = 23029000.

The previous prime is 28786343. The next prime is 28786397. The reversal of 28786375 is 57368782.

It is not a de Polignac number, because 28786375 - 2⁵ = 28786343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 115021 + ... + 115270.

It is an arithmetic number, because the mean of its divisors is an integer number (4490694).

Almost surely, 2^28786375 is an apocalyptic number.

28786375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28786375 is a deficient number, since it is larger than the sum of its proper divisors (7139177).

28786375 is an equidigital number, since it uses as much as digits as its factorization.

28786375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230306 (or 230296 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 28786375 is about 5365.2935614000. The cubic root of 28786375 is about 306.4754275271.

It can be divided in two parts, 28786 and 375, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 28786375 in words is "twenty-eight million, seven hundred eighty-six thousand, three hundred seventy-five".