28706875 has 20 divisors (see below), whose sum is σ = 37450512. Its totient is φ = 21956000.

The previous prime is 28706833. The next prime is 28706879. The reversal of 28706875 is 57860782.

It is a happy number.

It is not a de Polignac number, because 28706875 - 2⁷ = 28706747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28706879) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13377 + ... + 15373.

Almost surely, 2^28706875 is an apocalyptic number.

28706875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28706875 is a deficient number, since it is larger than the sum of its proper divisors (8743637).

28706875 is an equidigital number, since it uses as much as digits as its factorization.

28706875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040 (or 2025 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 28706875 is about 5357.8797112291. The cubic root of 28706875 is about 306.1930339691.

The spelling of 28706875 in words is "twenty-eight million, seven hundred six thousand, eight hundred seventy-five".