28842001 has 2 divisors, whose sum is σ = 28842002. Its totient is φ = 28842000.

The previous prime is 28841987. The next prime is 28842043. The reversal of 28842001 is 10024882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28344976 + 497025 = 5324^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 28842001 - 2⁹ = 28841489 is a prime.

It is a super-2 number, since 2×28842001² = 1663722043368002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28842101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14421000 + 14421001.

It is an arithmetic number, because the mean of its divisors is an integer number (14421001).

Almost surely, 2^28842001 is an apocalyptic number.

It is an amenable number.

28842001 is a deficient number, since it is larger than the sum of its proper divisors (1).

28842001 is an equidigital number, since it uses as much as digits as its factorization.

28842001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 28842001 is about 5370.4749324431. The cubic root of 28842001 is about 306.6727087394.

Adding to 28842001 its reverse (10024882), we get a palindrome (38866883).

The spelling of 28842001 in words is "twenty-eight million, eight hundred forty-two thousand, one".