28131295 has 4 divisors (see below), whose sum is σ = 33757560. Its totient is φ = 22505032.

The previous prime is 28131283. The next prime is 28131307. The reversal of 28131295 is 59213182.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28131283) and next prime (28131307).

It is a cyclic number.

It is not a de Polignac number, because 28131295 - 2¹³ = 28123103 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2813125 + ... + 2813134.

It is an arithmetic number, because the mean of its divisors is an integer number (8439390).

Almost surely, 2^28131295 is an apocalyptic number.

28131295 is a deficient number, since it is larger than the sum of its proper divisors (5626265).

28131295 is an equidigital number, since it uses as much as digits as its factorization.

28131295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626264.

The product of its digits is 4320, while the sum is 31.

The square root of 28131295 is about 5303.8943239850. The cubic root of 28131295 is about 304.1327869522.

The spelling of 28131295 in words is "twenty-eight million, one hundred thirty-one thousand, two hundred ninety-five".