28727187 has 8 divisors (see below), whose sum is σ = 38335440. Its totient is φ = 19135200.

The previous prime is 28727177. The next prime is 28727189. The reversal of 28727187 is 78172782.

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

It is not a de Polignac number, because 28727187 - 2⁶ = 28727123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28727189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937 + ... + 7637.

It is an arithmetic number, because the mean of its divisors is an integer number (4791930).

Almost surely, 2^28727187 is an apocalyptic number.

28727187 is a deficient number, since it is larger than the sum of its proper divisors (9608253).

28727187 is a wasteful number, since it uses less digits than its factorization.

28727187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8133.

The product of its digits is 87808, while the sum is 42.

The square root of 28727187 is about 5359.7749019898. The cubic root of 28727187 is about 306.2652341721.

The spelling of 28727187 in words is "twenty-eight million, seven hundred twenty-seven thousand, one hundred eighty-seven".