28187995 has 16 divisors (see below), whose sum is σ = 38506752. Its totient is φ = 19608160.

The previous prime is 28187993. The next prime is 28188007. The reversal of 28187995 is 59978182.

It is not a de Polignac number, because 28187995 - 2¹ = 28187993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28187993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9877 + ... + 12406.

It is an arithmetic number, because the mean of its divisors is an integer number (2406672).

Almost surely, 2^28187995 is an apocalyptic number.

28187995 is a deficient number, since it is larger than the sum of its proper divisors (10318757).

28187995 is a wasteful number, since it uses less digits than its factorization.

28187995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22322.

The product of its digits is 362880, while the sum is 49.

The square root of 28187995 is about 5309.2367624735. The cubic root of 28187995 is about 304.3369813246.

The spelling of 28187995 in words is "twenty-eight million, one hundred eighty-seven thousand, nine hundred ninety-five".