28040284711 has 4 divisors (see below), whose sum is σ = 28045409832. Its totient is φ = 28035159592.

The previous prime is 28040284693. The next prime is 28040284733. The reversal of 28040284711 is 11748204082.

It is a happy number.

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 28040284711 - 2⁹ = 28040284199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28040284511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2554345 + ... + 2565298.

It is an arithmetic number, because the mean of its divisors is an integer number (7011352458).

Almost surely, 2^28040284711 is an apocalyptic number.

28040284711 is a deficient number, since it is larger than the sum of its proper divisors (5125121).

28040284711 is an equidigital number, since it uses as much as digits as its factorization.

28040284711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5125120.

The product of its (nonzero) digits is 28672, while the sum is 37.

Adding to 28040284711 its reverse (11748204082), we get a palindrome (39788488793).

The spelling of 28040284711 in words is "twenty-eight billion, forty million, two hundred eighty-four thousand, seven hundred eleven".