28318411 has 4 divisors (see below), whose sum is σ = 30892824. Its totient is φ = 25744000.

The previous prime is 28318391. The next prime is 28318427. The reversal of 28318411 is 11481382.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28318411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28318411.

It is not an unprimeable number, because it can be changed into a prime (28318441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287190 + ... + 1287211.

It is an arithmetic number, because the mean of its divisors is an integer number (7723206).

Almost surely, 2^28318411 is an apocalyptic number.

28318411 is a deficient number, since it is larger than the sum of its proper divisors (2574413).

28318411 is a wasteful number, since it uses less digits than its factorization.

28318411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574412.

The product of its digits is 1536, while the sum is 28.

The square root of 28318411 is about 5321.5045804735. The cubic root of 28318411 is about 304.8056129458.

Adding to 28318411 its reverse (11481382), we get a palindrome (39799793).

The spelling of 28318411 in words is "twenty-eight million, three hundred eighteen thousand, four hundred eleven".