28749841 has 2 divisors, whose sum is σ = 28749842. Its totient is φ = 28749840.

The previous prime is 28749827. The next prime is 28749857. The reversal of 28749841 is 14894782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16646400 + 12103441 = 4080^2 + 3479^2 .

It is a cyclic number.

It is not a de Polignac number, because 28749841 - 2⁷ = 28749713 is a prime.

It is not a weakly prime, because it can be changed into another prime (28749811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14374920 + 14374921.

It is an arithmetic number, because the mean of its divisors is an integer number (14374921).

Almost surely, 2^28749841 is an apocalyptic number.

It is an amenable number.

28749841 is a deficient number, since it is larger than the sum of its proper divisors (1).

28749841 is an equidigital number, since it uses as much as digits as its factorization.

28749841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 28749841 is about 5361.8878205349. The cubic root of 28749841 is about 306.3457190177.

The spelling of 28749841 in words is "twenty-eight million, seven hundred forty-nine thousand, eight hundred forty-one".