28711135 has 4 divisors (see below), whose sum is σ = 34453368. Its totient is φ = 22968904.

The previous prime is 28711121. The next prime is 28711157. The reversal of 28711135 is 53111782.

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

It is a cyclic number.

It is not a de Polignac number, because 28711135 - 2⁵ = 28711103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2871109 + ... + 2871118.

It is an arithmetic number, because the mean of its divisors is an integer number (8613342).

Almost surely, 2^28711135 is an apocalyptic number.

28711135 is a deficient number, since it is larger than the sum of its proper divisors (5742233).

28711135 is an equidigital number, since it uses as much as digits as its factorization.

28711135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5742232.

The product of its digits is 1680, while the sum is 28.

The square root of 28711135 is about 5358.2772418008. The cubic root of 28711135 is about 306.2081792123.

The spelling of 28711135 in words is "twenty-eight million, seven hundred eleven thousand, one hundred thirty-five".