28124441 has 2 divisors, whose sum is σ = 28124442. Its totient is φ = 28124440.

The previous prime is 28124429. The next prime is 28124479. The reversal of 28124441 is 14442182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17884441 + 10240000 = 4229^2 + 3200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28124441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28124441.

It is not a weakly prime, because it can be changed into another prime (28127441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14062220 + 14062221.

It is an arithmetic number, because the mean of its divisors is an integer number (14062221).

Almost surely, 2^28124441 is an apocalyptic number.

It is an amenable number.

28124441 is a deficient number, since it is larger than the sum of its proper divisors (1).

28124441 is an equidigital number, since it uses as much as digits as its factorization.

28124441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2048, while the sum is 26.

The square root of 28124441 is about 5303.2481556118. The cubic root of 28124441 is about 304.1080849796.

The spelling of 28124441 in words is "twenty-eight million, one hundred twenty-four thousand, four hundred forty-one".