28489441 has 2 divisors, whose sum is σ = 28489442. Its totient is φ = 28489440.

The previous prime is 28489429. The next prime is 28489451. The reversal of 28489441 is 14498482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28313041 + 176400 = 5321^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 28489441 - 2⁷ = 28489313 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28489394 and 28489403.

It is not a weakly prime, because it can be changed into another prime (28489411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14244720 + 14244721.

It is an arithmetic number, because the mean of its divisors is an integer number (14244721).

Almost surely, 2^28489441 is an apocalyptic number.

It is an amenable number.

28489441 is a deficient number, since it is larger than the sum of its proper divisors (1).

28489441 is an equidigital number, since it uses as much as digits as its factorization.

28489441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 40.

The square root of 28489441 is about 5337.5500934417. The cubic root of 28489441 is about 305.4180096645.

The spelling of 28489441 in words is "twenty-eight million, four hundred eighty-nine thousand, four hundred forty-one".