28124811 has 54 divisors (see below), whose sum is σ = 49188204. Its totient is φ = 15350400.

The previous prime is 28124797. The next prime is 28124813. The reversal of 28124811 is 11842182.

It is not a de Polignac number, because 28124811 - 2¹⁰ = 28123787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28124813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 685951 + ... + 685991.

Almost surely, 2^28124811 is an apocalyptic number.

28124811 is a deficient number, since it is larger than the sum of its proper divisors (21063393).

28124811 is a wasteful number, since it uses less digits than its factorization.

28124811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 68 counting only the distinct ones).

The product of its digits is 1024, while the sum is 27.

The square root of 28124811 is about 5303.2830397783. The cubic root of 28124811 is about 304.1094185705.

Adding to 28124811 its reverse (11842182), we get a palindrome (39966993).

The spelling of 28124811 in words is "twenty-eight million, one hundred twenty-four thousand, eight hundred eleven".