28873187 has 8 divisors (see below), whose sum is σ = 33043296. Its totient is φ = 24714432.

The previous prime is 28873151. The next prime is 28873189. The reversal of 28873187 is 78137882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28873187 - 2²⁴ = 12095971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28873189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3593 + ... + 8405.

It is an arithmetic number, because the mean of its divisors is an integer number (4130412).

Almost surely, 2^28873187 is an apocalyptic number.

28873187 is a deficient number, since it is larger than the sum of its proper divisors (4170109).

28873187 is an equidigital number, since it uses as much as digits as its factorization.

28873187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5677.

The product of its digits is 150528, while the sum is 44.

The square root of 28873187 is about 5373.3776156157. The cubic root of 28873187 is about 306.7832009588.

The spelling of 28873187 in words is "twenty-eight million, eight hundred seventy-three thousand, one hundred eighty-seven".