28442741 has 2 divisors, whose sum is σ = 28442742. Its totient is φ = 28442740.

The previous prime is 28442731. The next prime is 28442749. The reversal of 28442741 is 14724482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24542116 + 3900625 = 4954^2 + 1975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28442741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28442698 and 28442707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28442749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14221370 + 14221371.

It is an arithmetic number, because the mean of its divisors is an integer number (14221371).

Almost surely, 2^28442741 is an apocalyptic number.

It is an amenable number.

28442741 is a deficient number, since it is larger than the sum of its proper divisors (1).

28442741 is an equidigital number, since it uses as much as digits as its factorization.

28442741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14336, while the sum is 32.

The square root of 28442741 is about 5333.1736330256. The cubic root of 28442741 is about 305.2510376099.

The spelling of 28442741 in words is "twenty-eight million, four hundred forty-two thousand, seven hundred forty-one".